From 8bd98e2d4c570dc8e21115dcd3df2d3bb88e057c Mon Sep 17 00:00:00 2001
From: Waylon Flinn <waylonflinn@gmail.com>
Date: Fri, 11 Mar 2016 08:55:30 -0600
Subject: [PATCH] set up gh pages branch

---
 .gitignore |     1 -
 bundle.js  | 18137 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 18137 insertions(+), 1 deletion(-)
 create mode 100644 bundle.js

diff --git a/.gitignore b/.gitignore
index d1c1dbe..3c3629e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
 node_modules
-bundle.js
diff --git a/bundle.js b/bundle.js
new file mode 100644
index 0000000..cc23752
--- /dev/null
+++ b/bundle.js
@@ -0,0 +1,18137 @@
+(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+var md = require('markdown-it')(),
+	mk = require('./index');
+
+md.use(mk);
+
+var input = document.getElementById('input'),
+	output = document.getElementById('output'),
+	button = document.getElementById('button');
+
+button.addEventListener('click', function(ev){
+
+	var result = md.render(input.value);
+
+	output.innerHTML = result;
+
+});
+
+/*
+
+# Some Math
+
+$\sqrt{3x-1}+(1+x)^2$
+
+# Maxwells Equations
+
+$\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t}
+= \frac{4\pi}{c}\vec{\mathbf{j}}    \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho$
+
+$\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t}  = \vec{\mathbf{0}}$ (curl of $\vec{\mathbf{E}}$ is proportional to the time derivative of $\vec{\mathbf{B}}$)
+
+$\nabla \cdot \vec{\mathbf{B}}  = 0$
+
+
+
+\sqrt{3x-1}+(1+x)^2
+
+c = \pm\sqrt{a^2 + b^2}
+
+Maxwell's Equations
+
+\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t}
+= \frac{4\pi}{c}\vec{\mathbf{j}}    \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho
+
+\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t}  = \vec{\mathbf{0}}
+
+\nabla \cdot \vec{\mathbf{B}}  = 0
+
+Same thing in a LaTeX array
+\begin{array}{c}
+
+\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &
+= \frac{4\pi}{c}\vec{\mathbf{j}}    \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
+
+\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
+
+\nabla \cdot \vec{\mathbf{B}} & = 0
+
+\end{array}
+
+
+\begin{array}{c}
+y_1 \\
+y_2 \mathtt{t}_i \\
+z_{3,4}
+\end{array}
+
+\begin{array}{c}
+x' &=& &x \sin\phi &+& z \cos\phi \\
+z' &=& - &x \cos\phi &+& z \sin\phi \\
+\end{array}
+
+
+
+# Maxwell's Equations
+
+
+equation | description
+----------|------------
+$\nabla \cdot \vec{\mathbf{B}}  = 0$ | divergence of $\vec{\mathbf{B}}$ is zero
+$\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t}  = \vec{\mathbf{0}}$ |  curl of $\vec{\mathbf{E}}$ is proportional to the rate of change of $\vec{\mathbf{B}}$
+$\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} = \frac{4\pi}{c}\vec{\mathbf{j}}    \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho$ | wha?
+
+![electricity](http://i.giphy.com/Gty2oDYQ1fih2.gif)
+*/
+
+},{"./index":2,"markdown-it":28}],2:[function(require,module,exports){
+/* Process inline math */
+/*
+Like markdown-it-simplemath, this is a stripped down, simplified version of:
+https://github.com/runarberg/markdown-it-math
+
+It differs in that it takes (a subset of) LaTeX as input and relies on KaTeX
+for rendering output.
+*/
+
+'use strict';
+
+var katex = require('katex');
+
+
+function scanDelims(state, start, delimLength) {
+  var pos = start, lastChar, nextChar, count, can_open, can_close,
+      isLastWhiteSpace, isLastPunctChar,
+      isNextWhiteSpace, isNextPunctChar,
+      left_flanking = true,
+      right_flanking = true,
+      max = state.posMax,
+      isWhiteSpace = state.md.utils.isWhiteSpace,
+      isPunctChar = state.md.utils.isPunctChar,
+      isMdAsciiPunct = state.md.utils.isMdAsciiPunct;
+
+  // treat beginning of the line as a whitespace
+  lastChar = start > 0 ? state.src.charCodeAt(start - 1) : 0x20;
+
+  if (pos >= max) {
+    can_open = false;
+  }
+
+  pos += delimLength;
+
+  count = pos - start;
+
+  // treat end of the line as a whitespace
+  nextChar = pos < max ? state.src.charCodeAt(pos) : 0x20;
+
+  isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
+  isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
+
+  isLastWhiteSpace = isWhiteSpace(lastChar);
+  isNextWhiteSpace = isWhiteSpace(nextChar);
+
+  if (isNextWhiteSpace) {
+    left_flanking = false;
+  } else if (isNextPunctChar) {
+    if (!(isLastWhiteSpace || isLastPunctChar)) {
+      left_flanking = false;
+    }
+  }
+
+  if (isLastWhiteSpace) {
+    right_flanking = false;
+  } else if (isLastPunctChar) {
+    if (!(isNextWhiteSpace || isNextPunctChar)) {
+      right_flanking = false;
+    }
+  }
+
+  can_open = left_flanking;
+  can_close = right_flanking;
+
+  return {
+    can_open: can_open,
+    can_close: can_close,
+    delims: count
+  };
+}
+
+
+function makeMath_inline(open, close) {
+  return function math_inline(state, silent) {
+    var startCount,
+        found,
+        res,
+        token,
+        closeDelim,
+        max = state.posMax,
+        start = state.pos,
+        openDelim = state.src.slice(start, start + open.length);
+
+    if (openDelim !== open) { return false; }
+    if (silent) { return false; }    // Don’t run any pairs in validation mode
+
+    res = scanDelims(state, start, openDelim.length);
+    startCount = res.delims;
+
+    if (!res.can_open) {
+      state.pos += startCount;
+      // Earlier we checked !silent, but this implementation does not need it
+      state.pending += state.src.slice(start, state.pos);
+      return true;
+    }
+
+    state.pos = start + open.length;
+
+    while (state.pos < max) {
+      closeDelim = state.src.slice(state.pos, state.pos + close.length);
+      if (closeDelim === close) {
+        res = scanDelims(state, state.pos, close.length);
+        if (res.can_close) {
+          found = true;
+          break;
+        }
+      }
+
+      state.md.inline.skipToken(state);
+    }
+
+    if (!found) {
+      // Parser failed to find ending tag, so it is not a valid math
+      state.pos = start;
+      return false;
+    }
+
+    // Found!
+    state.posMax = state.pos;
+    state.pos = start + close.length;
+
+    // Earlier we checked !silent, but this implementation does not need it
+    token = state.push('math_inline', 'math', 0);
+    token.content = state.src.slice(state.pos, state.posMax);
+    token.markup = open;
+
+    state.pos = state.posMax + close.length;
+    state.posMax = max;
+
+    return true;
+  };
+}
+
+function makeMath_block(open, close) {
+  return function math_block(state, startLine, endLine, silent) {
+    var openDelim, len, params, nextLine, token, firstLine, lastLine, lastLinePos,
+        haveEndMarker = false,
+        pos = state.bMarks[startLine] + state.tShift[startLine],
+        max = state.eMarks[startLine];
+
+    if (pos + open.length > max) { return false; }
+
+    openDelim = state.src.slice(pos, pos + open.length);
+
+    if (openDelim !== open) { return false; }
+
+    pos += open.length;
+    firstLine = state.src.slice(pos, max);
+
+    // Since start is found, we can report success here in validation mode
+    if (silent) { return true; }
+
+    if (firstLine.trim().slice(-close.length) === close) {
+      // Single line expression
+      firstLine = firstLine.trim().slice(0, -close.length);
+      haveEndMarker = true;
+    }
+
+    // search end of block
+    nextLine = startLine;
+
+    for (;;) {
+      if (haveEndMarker) { break; }
+
+      nextLine++;
+
+      if (nextLine >= endLine) {
+        // unclosed block should be autoclosed by end of document.
+        // also block seems to be autoclosed by end of parent
+        break;
+      }
+
+      pos = state.bMarks[nextLine] + state.tShift[nextLine];
+      max = state.eMarks[nextLine];
+
+      if (pos < max && state.tShift[nextLine] < state.blkIndent) {
+        // non-empty line with negative indent should stop the list:
+        break;
+      }
+
+      if (state.src.slice(pos, max).trim().slice(-close.length) !== close) {
+        continue;
+      }
+
+      if (state.tShift[nextLine] - state.blkIndent >= 4) {
+        // closing block math should be indented less then 4 spaces
+        continue;
+      }
+
+      lastLinePos = state.src.slice(0, max).lastIndexOf(close);
+      lastLine = state.src.slice(pos, lastLinePos);
+
+      pos += lastLine.length + close.length;
+
+      // make sure tail has spaces only
+      pos = state.skipSpaces(pos);
+
+      if (pos < max) { continue; }
+
+      // found!
+      haveEndMarker = true;
+    }
+
+    // If math block has heading spaces, they should be removed from its inner block
+    len = state.tShift[startLine];
+
+    state.line = nextLine + (haveEndMarker ? 1 : 0);
+
+    token = state.push('math_block', 'math', 0);
+    token.block = true;
+    token.content = (firstLine && firstLine.trim() ? firstLine + '\n' : '') +
+      state.getLines(startLine + 1, nextLine, len, true) +
+      (lastLine && lastLine.trim() ? lastLine : '');
+    token.info = params;
+    token.map = [ startLine, state.line ];
+    token.markup = open;
+
+    return true;
+  };
+}
+
+
+module.exports = function math_plugin(md) {
+  // Default options
+
+  var inlineOpen = '$',
+      inlineClose = '$',
+      blockOpen = '$$',
+      blockClose = '$$';
+  // set KaTeX as the renderer for markdown-it-simplemath
+  var katexInline = function(latex){
+    return katex.renderToString(latex, {"displayMode" : false});
+  };
+
+  var inlineRenderer = function(tokens, idx){
+    return katexInline(tokens[idx].content);
+  };
+
+  var katexBlock = function(latex){
+    return katex.renderToString(latex, {"displayMode" : true});
+  }
+
+  var blockRenderer = function(tokens, idx){
+    return  katexBlock(tokens[idx].content) + '\n';
+  }
+
+  var math_inline = makeMath_inline(inlineOpen, inlineClose);
+  var math_block = makeMath_block(blockOpen, blockClose);
+
+  md.inline.ruler.before('escape', 'math_inline', math_inline);
+  md.block.ruler.after('blockquote', 'math_block', math_block, {
+    alt: [ 'paragraph', 'reference', 'blockquote', 'list' ]
+  });
+  md.renderer.rules.math_inline = inlineRenderer;
+  md.renderer.rules.math_block = blockRenderer;
+};
+
+},{"katex":4}],3:[function(require,module,exports){
+module.exports={"Aacute":"\u00C1","aacute":"\u00E1","Abreve":"\u0102","abreve":"\u0103","ac":"\u223E","acd":"\u223F","acE":"\u223E\u0333","Acirc":"\u00C2","acirc":"\u00E2","acute":"\u00B4","Acy":"\u0410","acy":"\u0430","AElig":"\u00C6","aelig":"\u00E6","af":"\u2061","Afr":"\uD835\uDD04","afr":"\uD835\uDD1E","Agrave":"\u00C0","agrave":"\u00E0","alefsym":"\u2135","aleph":"\u2135","Alpha":"\u0391","alpha":"\u03B1","Amacr":"\u0100","amacr":"\u0101","amalg":"\u2A3F","amp":"&","AMP":"&","andand":"\u2A55","And":"\u2A53","and":"\u2227","andd":"\u2A5C","andslope":"\u2A58","andv":"\u2A5A","ang":"\u2220","ange":"\u29A4","angle":"\u2220","angmsdaa":"\u29A8","angmsdab":"\u29A9","angmsdac":"\u29AA","angmsdad":"\u29AB","angmsdae":"\u29AC","angmsdaf":"\u29AD","angmsdag":"\u29AE","angmsdah":"\u29AF","angmsd":"\u2221","angrt":"\u221F","angrtvb":"\u22BE","angrtvbd":"\u299D","angsph":"\u2222","angst":"\u00C5","angzarr":"\u237C","Aogon":"\u0104","aogon":"\u0105","Aopf":"\uD835\uDD38","aopf":"\uD835\uDD52","apacir":"\u2A6F","ap":"\u2248","apE":"\u2A70","ape":"\u224A","apid":"\u224B","apos":"'","ApplyFunction":"\u2061","approx":"\u2248","approxeq":"\u224A","Aring":"\u00C5","aring":"\u00E5","Ascr":"\uD835\uDC9C","ascr":"\uD835\uDCB6","Assign":"\u2254","ast":"*","asymp":"\u2248","asympeq":"\u224D","Atilde":"\u00C3","atilde":"\u00E3","Auml":"\u00C4","auml":"\u00E4","awconint":"\u2233","awint":"\u2A11","backcong":"\u224C","backepsilon":"\u03F6","backprime":"\u2035","backsim":"\u223D","backsimeq":"\u22CD","Backslash":"\u2216","Barv":"\u2AE7","barvee":"\u22BD","barwed":"\u2305","Barwed":"\u2306","barwedge":"\u2305","bbrk":"\u23B5","bbrktbrk":"\u23B6","bcong":"\u224C","Bcy":"\u0411","bcy":"\u0431","bdquo":"\u201E","becaus":"\u2235","because":"\u2235","Because":"\u2235","bemptyv":"\u29B0","bepsi":"\u03F6","bernou":"\u212C","Bernoullis":"\u212C","Beta":"\u0392","beta":"\u03B2","beth":"\u2136","between":"\u226C","Bfr":"\uD835\uDD05","bfr":"\uD835\uDD1F","bigcap":"\u22C2","bigcirc":"\u25EF","bigcup":"\u22C3","bigodot":"\u2A00","bigoplus":"\u2A01","bigotimes":"\u2A02","bigsqcup":"\u2A06","bigstar":"\u2605","bigtriangledown":"\u25BD","bigtriangleup":"\u25B3","biguplus":"\u2A04","bigvee":"\u22C1","bigwedge":"\u22C0","bkarow":"\u290D","blacklozenge":"\u29EB","blacksquare":"\u25AA","blacktriangle":"\u25B4","blacktriangledown":"\u25BE","blacktriangleleft":"\u25C2","blacktriangleright":"\u25B8","blank":"\u2423","blk12":"\u2592","blk14":"\u2591","blk34":"\u2593","block":"\u2588","bne":"=\u20E5","bnequiv":"\u2261\u20E5","bNot":"\u2AED","bnot":"\u2310","Bopf":"\uD835\uDD39","bopf":"\uD835\uDD53","bot":"\u22A5","bottom":"\u22A5","bowtie":"\u22C8","boxbox":"\u29C9","boxdl":"\u2510","boxdL":"\u2555","boxDl":"\u2556","boxDL":"\u2557","boxdr":"\u250C","boxdR":"\u2552","boxDr":"\u2553","boxDR":"\u2554","boxh":"\u2500","boxH":"\u2550","boxhd":"\u252C","boxHd":"\u2564","boxhD":"\u2565","boxHD":"\u2566","boxhu":"\u2534","boxHu":"\u2567","boxhU":"\u2568","boxHU":"\u2569","boxminus":"\u229F","boxplus":"\u229E","boxtimes":"\u22A0","boxul":"\u2518","boxuL":"\u255B","boxUl":"\u255C","boxUL":"\u255D","boxur":"\u2514","boxuR":"\u2558","boxUr":"\u2559","boxUR":"\u255A","boxv":"\u2502","boxV":"\u2551","boxvh":"\u253C","boxvH":"\u256A","boxVh":"\u256B","boxVH":"\u256C","boxvl":"\u2524","boxvL":"\u2561","boxVl":"\u2562","boxVL":"\u2563","boxvr":"\u251C","boxvR":"\u255E","boxVr":"\u255F","boxVR":"\u2560","bprime":"\u2035","breve":"\u02D8","Breve":"\u02D8","brvbar":"\u00A6","bscr":"\uD835\uDCB7","Bscr":"\u212C","bsemi":"\u204F","bsim":"\u223D","bsime":"\u22CD","bsolb":"\u29C5","bsol":"\\","bsolhsub":"\u27C8","bull":"\u2022","bullet":"\u2022","bump":"\u224E","bumpE":"\u2AAE","bumpe":"\u224F","Bumpeq":"\u224E","bumpeq":"\u224F","Cacute":"\u0106","cacute":"\u0107","capand":"\u2A44","capbrcup":"\u2A49","capcap":"\u2A4B","cap":"\u2229","Cap":"\u22D2","capcup":"\u2A47","capdot":"\u2A40","CapitalDifferentialD":"\u2145","caps":"\u2229\uFE00","caret":"\u2041","caron":"\u02C7","Cayleys":"\u212D","ccaps":"\u2A4D","Ccaron":"\u010C","ccaron":"\u010D","Ccedil":"\u00C7","ccedil":"\u00E7","Ccirc":"\u0108","ccirc":"\u0109","Cconint":"\u2230","ccups":"\u2A4C","ccupssm":"\u2A50","Cdot":"\u010A","cdot":"\u010B","cedil":"\u00B8","Cedilla":"\u00B8","cemptyv":"\u29B2","cent":"\u00A2","centerdot":"\u00B7","CenterDot":"\u00B7","cfr":"\uD835\uDD20","Cfr":"\u212D","CHcy":"\u0427","chcy":"\u0447","check":"\u2713","checkmark":"\u2713","Chi":"\u03A7","chi":"\u03C7","circ":"\u02C6","circeq":"\u2257","circlearrowleft":"\u21BA","circlearrowright":"\u21BB","circledast":"\u229B","circledcirc":"\u229A","circleddash":"\u229D","CircleDot":"\u2299","circledR":"\u00AE","circledS":"\u24C8","CircleMinus":"\u2296","CirclePlus":"\u2295","CircleTimes":"\u2297","cir":"\u25CB","cirE":"\u29C3","cire":"\u2257","cirfnint":"\u2A10","cirmid":"\u2AEF","cirscir":"\u29C2","ClockwiseContourIntegral":"\u2232","CloseCurlyDoubleQuote":"\u201D","CloseCurlyQuote":"\u2019","clubs":"\u2663","clubsuit":"\u2663","colon":":","Colon":"\u2237","Colone":"\u2A74","colone":"\u2254","coloneq":"\u2254","comma":",","commat":"@","comp":"\u2201","compfn":"\u2218","complement":"\u2201","complexes":"\u2102","cong":"\u2245","congdot":"\u2A6D","Congruent":"\u2261","conint":"\u222E","Conint":"\u222F","ContourIntegral":"\u222E","copf":"\uD835\uDD54","Copf":"\u2102","coprod":"\u2210","Coproduct":"\u2210","copy":"\u00A9","COPY":"\u00A9","copysr":"\u2117","CounterClockwiseContourIntegral":"\u2233","crarr":"\u21B5","cross":"\u2717","Cross":"\u2A2F","Cscr":"\uD835\uDC9E","cscr":"\uD835\uDCB8","csub":"\u2ACF","csube":"\u2AD1","csup":"\u2AD0","csupe":"\u2AD2","ctdot":"\u22EF","cudarrl":"\u2938","cudarrr":"\u2935","cuepr":"\u22DE","cuesc":"\u22DF","cularr":"\u21B6","cularrp":"\u293D","cupbrcap":"\u2A48","cupcap":"\u2A46","CupCap":"\u224D","cup":"\u222A","Cup":"\u22D3","cupcup":"\u2A4A","cupdot":"\u228D","cupor":"\u2A45","cups":"\u222A\uFE00","curarr":"\u21B7","curarrm":"\u293C","curlyeqprec":"\u22DE","curlyeqsucc":"\u22DF","curlyvee":"\u22CE","curlywedge":"\u22CF","curren":"\u00A4","curvearrowleft":"\u21B6","curvearrowright":"\u21B7","cuvee":"\u22CE","cuwed":"\u22CF","cwconint":"\u2232","cwint":"\u2231","cylcty":"\u232D","dagger":"\u2020","Dagger":"\u2021","daleth":"\u2138","darr":"\u2193","Darr":"\u21A1","dArr":"\u21D3","dash":"\u2010","Dashv":"\u2AE4","dashv":"\u22A3","dbkarow":"\u290F","dblac":"\u02DD","Dcaron":"\u010E","dcaron":"\u010F","Dcy":"\u0414","dcy":"\u0434","ddagger":"\u2021","ddarr":"\u21CA","DD":"\u2145","dd":"\u2146","DDotrahd":"\u2911","ddotseq":"\u2A77","deg":"\u00B0","Del":"\u2207","Delta":"\u0394","delta":"\u03B4","demptyv":"\u29B1","dfisht":"\u297F","Dfr":"\uD835\uDD07","dfr":"\uD835\uDD21","dHar":"\u2965","dharl":"\u21C3","dharr":"\u21C2","DiacriticalAcute":"\u00B4","DiacriticalDot":"\u02D9","DiacriticalDoubleAcute":"\u02DD","DiacriticalGrave":"`","DiacriticalTilde":"\u02DC","diam":"\u22C4","diamond":"\u22C4","Diamond":"\u22C4","diamondsuit":"\u2666","diams":"\u2666","die":"\u00A8","DifferentialD":"\u2146","digamma":"\u03DD","disin":"\u22F2","div":"\u00F7","divide":"\u00F7","divideontimes":"\u22C7","divonx":"\u22C7","DJcy":"\u0402","djcy":"\u0452","dlcorn":"\u231E","dlcrop":"\u230D","dollar":"$","Dopf":"\uD835\uDD3B","dopf":"\uD835\uDD55","Dot":"\u00A8","dot":"\u02D9","DotDot":"\u20DC","doteq":"\u2250","doteqdot":"\u2251","DotEqual":"\u2250","dotminus":"\u2238","dotplus":"\u2214","dotsquare":"\u22A1","doublebarwedge":"\u2306","DoubleContourIntegral":"\u222F","DoubleDot":"\u00A8","DoubleDownArrow":"\u21D3","DoubleLeftArrow":"\u21D0","DoubleLeftRightArrow":"\u21D4","DoubleLeftTee":"\u2AE4","DoubleLongLeftArrow":"\u27F8","DoubleLongLeftRightArrow":"\u27FA","DoubleLongRightArrow":"\u27F9","DoubleRightArrow":"\u21D2","DoubleRightTee":"\u22A8","DoubleUpArrow":"\u21D1","DoubleUpDownArrow":"\u21D5","DoubleVerticalBar":"\u2225","DownArrowBar":"\u2913","downarrow":"\u2193","DownArrow":"\u2193","Downarrow":"\u21D3","DownArrowUpArrow":"\u21F5","DownBreve":"\u0311","downdownarrows":"\u21CA","downharpoonleft":"\u21C3","downharpoonright":"\u21C2","DownLeftRightVector":"\u2950","DownLeftTeeVector":"\u295E","DownLeftVectorBar":"\u2956","DownLeftVector":"\u21BD","DownRightTeeVector":"\u295F","DownRightVectorBar":"\u2957","DownRightVector":"\u21C1","DownTeeArrow":"\u21A7","DownTee":"\u22A4","drbkarow":"\u2910","drcorn":"\u231F","drcrop":"\u230C","Dscr":"\uD835\uDC9F","dscr":"\uD835\uDCB9","DScy":"\u0405","dscy":"\u0455","dsol":"\u29F6","Dstrok":"\u0110","dstrok":"\u0111","dtdot":"\u22F1","dtri":"\u25BF","dtrif":"\u25BE","duarr":"\u21F5","duhar":"\u296F","dwangle":"\u29A6","DZcy":"\u040F","dzcy":"\u045F","dzigrarr":"\u27FF","Eacute":"\u00C9","eacute":"\u00E9","easter":"\u2A6E","Ecaron":"\u011A","ecaron":"\u011B","Ecirc":"\u00CA","ecirc":"\u00EA","ecir":"\u2256","ecolon":"\u2255","Ecy":"\u042D","ecy":"\u044D","eDDot":"\u2A77","Edot":"\u0116","edot":"\u0117","eDot":"\u2251","ee":"\u2147","efDot":"\u2252","Efr":"\uD835\uDD08","efr":"\uD835\uDD22","eg":"\u2A9A","Egrave":"\u00C8","egrave":"\u00E8","egs":"\u2A96","egsdot":"\u2A98","el":"\u2A99","Element":"\u2208","elinters":"\u23E7","ell":"\u2113","els":"\u2A95","elsdot":"\u2A97","Emacr":"\u0112","emacr":"\u0113","empty":"\u2205","emptyset":"\u2205","EmptySmallSquare":"\u25FB","emptyv":"\u2205","EmptyVerySmallSquare":"\u25AB","emsp13":"\u2004","emsp14":"\u2005","emsp":"\u2003","ENG":"\u014A","eng":"\u014B","ensp":"\u2002","Eogon":"\u0118","eogon":"\u0119","Eopf":"\uD835\uDD3C","eopf":"\uD835\uDD56","epar":"\u22D5","eparsl":"\u29E3","eplus":"\u2A71","epsi":"\u03B5","Epsilon":"\u0395","epsilon":"\u03B5","epsiv":"\u03F5","eqcirc":"\u2256","eqcolon":"\u2255","eqsim":"\u2242","eqslantgtr":"\u2A96","eqslantless":"\u2A95","Equal":"\u2A75","equals":"=","EqualTilde":"\u2242","equest":"\u225F","Equilibrium":"\u21CC","equiv":"\u2261","equivDD":"\u2A78","eqvparsl":"\u29E5","erarr":"\u2971","erDot":"\u2253","escr":"\u212F","Escr":"\u2130","esdot":"\u2250","Esim":"\u2A73","esim":"\u2242","Eta":"\u0397","eta":"\u03B7","ETH":"\u00D0","eth":"\u00F0","Euml":"\u00CB","euml":"\u00EB","euro":"\u20AC","excl":"!","exist":"\u2203","Exists":"\u2203","expectation":"\u2130","exponentiale":"\u2147","ExponentialE":"\u2147","fallingdotseq":"\u2252","Fcy":"\u0424","fcy":"\u0444","female":"\u2640","ffilig":"\uFB03","fflig":"\uFB00","ffllig":"\uFB04","Ffr":"\uD835\uDD09","ffr":"\uD835\uDD23","filig":"\uFB01","FilledSmallSquare":"\u25FC","FilledVerySmallSquare":"\u25AA","fjlig":"fj","flat":"\u266D","fllig":"\uFB02","fltns":"\u25B1","fnof":"\u0192","Fopf":"\uD835\uDD3D","fopf":"\uD835\uDD57","forall":"\u2200","ForAll":"\u2200","fork":"\u22D4","forkv":"\u2AD9","Fouriertrf":"\u2131","fpartint":"\u2A0D","frac12":"\u00BD","frac13":"\u2153","frac14":"\u00BC","frac15":"\u2155","frac16":"\u2159","frac18":"\u215B","frac23":"\u2154","frac25":"\u2156","frac34":"\u00BE","frac35":"\u2157","frac38":"\u215C","frac45":"\u2158","frac56":"\u215A","frac58":"\u215D","frac78":"\u215E","frasl":"\u2044","frown":"\u2322","fscr":"\uD835\uDCBB","Fscr":"\u2131","gacute":"\u01F5","Gamma":"\u0393","gamma":"\u03B3","Gammad":"\u03DC","gammad":"\u03DD","gap":"\u2A86","Gbreve":"\u011E","gbreve":"\u011F","Gcedil":"\u0122","Gcirc":"\u011C","gcirc":"\u011D","Gcy":"\u0413","gcy":"\u0433","Gdot":"\u0120","gdot":"\u0121","ge":"\u2265","gE":"\u2267","gEl":"\u2A8C","gel":"\u22DB","geq":"\u2265","geqq":"\u2267","geqslant":"\u2A7E","gescc":"\u2AA9","ges":"\u2A7E","gesdot":"\u2A80","gesdoto":"\u2A82","gesdotol":"\u2A84","gesl":"\u22DB\uFE00","gesles":"\u2A94","Gfr":"\uD835\uDD0A","gfr":"\uD835\uDD24","gg":"\u226B","Gg":"\u22D9","ggg":"\u22D9","gimel":"\u2137","GJcy":"\u0403","gjcy":"\u0453","gla":"\u2AA5","gl":"\u2277","glE":"\u2A92","glj":"\u2AA4","gnap":"\u2A8A","gnapprox":"\u2A8A","gne":"\u2A88","gnE":"\u2269","gneq":"\u2A88","gneqq":"\u2269","gnsim":"\u22E7","Gopf":"\uD835\uDD3E","gopf":"\uD835\uDD58","grave":"`","GreaterEqual":"\u2265","GreaterEqualLess":"\u22DB","GreaterFullEqual":"\u2267","GreaterGreater":"\u2AA2","GreaterLess":"\u2277","GreaterSlantEqual":"\u2A7E","GreaterTilde":"\u2273","Gscr":"\uD835\uDCA2","gscr":"\u210A","gsim":"\u2273","gsime":"\u2A8E","gsiml":"\u2A90","gtcc":"\u2AA7","gtcir":"\u2A7A","gt":">","GT":">","Gt":"\u226B","gtdot":"\u22D7","gtlPar":"\u2995","gtquest":"\u2A7C","gtrapprox":"\u2A86","gtrarr":"\u2978","gtrdot":"\u22D7","gtreqless":"\u22DB","gtreqqless":"\u2A8C","gtrless":"\u2277","gtrsim":"\u2273","gvertneqq":"\u2269\uFE00","gvnE":"\u2269\uFE00","Hacek":"\u02C7","hairsp":"\u200A","half":"\u00BD","hamilt":"\u210B","HARDcy":"\u042A","hardcy":"\u044A","harrcir":"\u2948","harr":"\u2194","hArr":"\u21D4","harrw":"\u21AD","Hat":"^","hbar":"\u210F","Hcirc":"\u0124","hcirc":"\u0125","hearts":"\u2665","heartsuit":"\u2665","hellip":"\u2026","hercon":"\u22B9","hfr":"\uD835\uDD25","Hfr":"\u210C","HilbertSpace":"\u210B","hksearow":"\u2925","hkswarow":"\u2926","hoarr":"\u21FF","homtht":"\u223B","hookleftarrow":"\u21A9","hookrightarrow":"\u21AA","hopf":"\uD835\uDD59","Hopf":"\u210D","horbar":"\u2015","HorizontalLine":"\u2500","hscr":"\uD835\uDCBD","Hscr":"\u210B","hslash":"\u210F","Hstrok":"\u0126","hstrok":"\u0127","HumpDownHump":"\u224E","HumpEqual":"\u224F","hybull":"\u2043","hyphen":"\u2010","Iacute":"\u00CD","iacute":"\u00ED","ic":"\u2063","Icirc":"\u00CE","icirc":"\u00EE","Icy":"\u0418","icy":"\u0438","Idot":"\u0130","IEcy":"\u0415","iecy":"\u0435","iexcl":"\u00A1","iff":"\u21D4","ifr":"\uD835\uDD26","Ifr":"\u2111","Igrave":"\u00CC","igrave":"\u00EC","ii":"\u2148","iiiint":"\u2A0C","iiint":"\u222D","iinfin":"\u29DC","iiota":"\u2129","IJlig":"\u0132","ijlig":"\u0133","Imacr":"\u012A","imacr":"\u012B","image":"\u2111","ImaginaryI":"\u2148","imagline":"\u2110","imagpart":"\u2111","imath":"\u0131","Im":"\u2111","imof":"\u22B7","imped":"\u01B5","Implies":"\u21D2","incare":"\u2105","in":"\u2208","infin":"\u221E","infintie":"\u29DD","inodot":"\u0131","intcal":"\u22BA","int":"\u222B","Int":"\u222C","integers":"\u2124","Integral":"\u222B","intercal":"\u22BA","Intersection":"\u22C2","intlarhk":"\u2A17","intprod":"\u2A3C","InvisibleComma":"\u2063","InvisibleTimes":"\u2062","IOcy":"\u0401","iocy":"\u0451","Iogon":"\u012E","iogon":"\u012F","Iopf":"\uD835\uDD40","iopf":"\uD835\uDD5A","Iota":"\u0399","iota":"\u03B9","iprod":"\u2A3C","iquest":"\u00BF","iscr":"\uD835\uDCBE","Iscr":"\u2110","isin":"\u2208","isindot":"\u22F5","isinE":"\u22F9","isins":"\u22F4","isinsv":"\u22F3","isinv":"\u2208","it":"\u2062","Itilde":"\u0128","itilde":"\u0129","Iukcy":"\u0406","iukcy":"\u0456","Iuml":"\u00CF","iuml":"\u00EF","Jcirc":"\u0134","jcirc":"\u0135","Jcy":"\u0419","jcy":"\u0439","Jfr":"\uD835\uDD0D","jfr":"\uD835\uDD27","jmath":"\u0237","Jopf":"\uD835\uDD41","jopf":"\uD835\uDD5B","Jscr":"\uD835\uDCA5","jscr":"\uD835\uDCBF","Jsercy":"\u0408","jsercy":"\u0458","Jukcy":"\u0404","jukcy":"\u0454","Kappa":"\u039A","kappa":"\u03BA","kappav":"\u03F0","Kcedil":"\u0136","kcedil":"\u0137","Kcy":"\u041A","kcy":"\u043A","Kfr":"\uD835\uDD0E","kfr":"\uD835\uDD28","kgreen":"\u0138","KHcy":"\u0425","khcy":"\u044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:"\u223E","Mu":"\u039C","mu":"\u03BC","multimap":"\u22B8","mumap":"\u22B8","nabla":"\u2207","Nacute":"\u0143","nacute":"\u0144","nang":"\u2220\u20D2","nap":"\u2249","napE":"\u2A70\u0338","napid":"\u224B\u0338","napos":"\u0149","napprox":"\u2249","natural":"\u266E","naturals":"\u2115","natur":"\u266E","nbsp":"\u00A0","nbump":"\u224E\u0338","nbumpe":"\u224F\u0338","ncap":"\u2A43","Ncaron":"\u0147","ncaron":"\u0148","Ncedil":"\u0145","ncedil":"\u0146","ncong":"\u2247","ncongdot":"\u2A6D\u0338","ncup":"\u2A42","Ncy":"\u041D","ncy":"\u043D","ndash":"\u2013","nearhk":"\u2924","nearr":"\u2197","neArr":"\u21D7","nearrow":"\u2197","ne":"\u2260","nedot":"\u2250\u0338","NegativeMediumSpace":"\u200B","NegativeThickSpace":"\u200B","NegativeThinSpace":"\u200B","NegativeVeryThinSpace":"\u200B","nequiv":"\u2262","nesear":"\u2928","nesim":"\u2242\u0338","NestedGreaterGreater":"\u226B","NestedLessLess":"\u226A","NewLine":"\n","nexist":"\u2204","nexists":"\u2204","Nfr":"\uD835\uDD11","nfr":"\uD835\uDD2B","ngE":"\u2267\u0338","nge":"\u2271","ngeq":"\u2271","ngeqq":"\u2267\u0338","ngeqslant":"\u2A7E\u0338","nges":"\u2A7E\u0338","nGg":"\u22D9\u0338","ngsim":"\u2275","nGt":"\u226B\u20D2","ngt":"\u226F","ngtr":"\u226F","nGtv":"\u226B\u0338","nharr":"\u21AE","nhArr":"\u21CE","nhpar":"\u2AF2","ni":"\u220B","nis":"\u22FC","nisd":"\u22FA","niv":"\u220B","NJcy":"\u040A","njcy":"\u045A","nlarr":"\u219A","nlArr":"\u21CD","nldr":"\u2025","nlE":"\u2266\u0338","nle":"\u2270","nleftarrow":"\u219A","nLeftarrow":"\u21CD","nleftrightarrow":"\u21AE","nLeftrightarrow":"\u21CE","nleq":"\u2270","nleqq":"\u2266\u0338","nleqslant":"\u2A7D\u0338","nles":"\u2A7D\u0338","nless":"\u226E","nLl":"\u22D8\u0338","nlsim":"\u2274","nLt":"\u226A\u20D2","nlt":"\u226E","nltri":"\u22EA","nltrie":"\u22EC","nLtv":"\u226A\u0338","nmid":"\u2224","NoBreak":"\u2060","NonBreakingSpace":"\u00A0","nopf":"\uD835\uDD5F","Nopf":"\u2115","Not":"\u2AEC","not":"\u00AC","NotCongruent":"\u2262","NotCupCap":"\u226D","NotDoubleVerticalBar":"\u2226","NotElement":"\u2209","NotEqual":"\u2260","NotEqualTilde":"\u2242\u0338","NotExists":"\u2204","NotGreater":"\u226F","NotGreaterEqual":"\u2271","NotGreaterFullEqual":"\u2267\u0338","NotGreaterGreater":"\u226B\u0338","NotGreaterLess":"\u2279","NotGreaterSlantEqual":"\u2A7E\u0338","NotGreaterTilde":"\u2275","NotHumpDownHump":"\u224E\u0338","NotHumpEqual":"\u224F\u0338","notin":"\u2209","notindot":"\u22F5\u0338","notinE":"\u22F9\u0338","notinva":"\u2209","notinvb":"\u22F7","notinvc":"\u22F6","NotLeftTriangleBar":"\u29CF\u0338","NotLeftTriangle":"\u22EA","NotLeftTriangleEqual":"\u22EC","NotLess":"\u226E","NotLessEqual":"\u2270","NotLessGreater":"\u2278","NotLessLess":"\u226A\u0338","NotLessSlantEqual":"\u2A7D\u0338","NotLessTilde":"\u2274","NotNestedGreaterGreater":"\u2AA2\u0338","NotNestedLessLess":"\u2AA1\u0338","notni":"\u220C","notniva":"\u220C","notnivb":"\u22FE","notnivc":"\u22FD","NotPrecedes":"\u2280","NotPrecedesEqual":"\u2AAF\u0338","NotPrecedesSlantEqual":"\u22E0","NotReverseElement":"\u220C","NotRightTriangleBar":"\u29D0\u0338","NotRightTriangle":"\u22EB","NotRightTriangleEqual":"\u22ED","NotSquareSubset":"\u228F\u0338","NotSquareSubsetEqual":"\u22E2","NotSquareSuperset":"\u2290\u0338","NotSquareSupersetEqual":"\u22E3","NotSubset":"\u2282\u20D2","NotSubsetEqual":"\u2288","NotSucceeds":"\u2281","NotSucceedsEqual":"\u2AB0\u0338","NotSucceedsSlantEqual":"\u22E1","NotSucceedsTilde":"\u227F\u0338","NotSuperset":"\u2283\u20D2","NotSupersetEqual":"\u2289","NotTilde":"\u2241","NotTildeEqual":"\u2244","NotTildeFullEqual":"\u2247","NotTildeTilde":"\u2249","NotVerticalBar":"\u2224","nparallel":"\u2226","npar":"\u2226","nparsl":"\u2AFD\u20E5","npart":"\u2202\u0338","npolint":"\u2A14","npr":"\u2280","nprcue":"\u22E0","nprec":"\u2280","npreceq":"\u2AAF\u0338","npre":"\u2AAF\u0338","nrarrc":"\u2933\u0338","nrarr":"\u219B","nrArr":"\u21CF","nrarrw":"\u219D\u0338","nrightarrow":"\u219B","nRightarrow":"\u21CF","nrtri":"\u22EB","nrtrie":"\u22ED","nsc":"\u2281","nsccue":"\u22E1","nsce":"\u2AB0\u0338","Nscr":"\uD835\uDCA9","nscr":"\uD835\uDCC3","nshortmid":"\u2224","nshortparallel":"\u2226","nsim":"\u2241","nsime":"\u2244","nsimeq":"\u2244","nsmid":"\u2224","nspar":"\u2226","nsqsube":"\u22E2","nsqsupe":"\u22E3","nsub":"\u2284","nsubE":"\u2AC5\u0338","nsube":"\u2288","nsubset":"\u2282\u20D2","nsubseteq":"\u2288","nsubseteqq":"\u2AC5\u0338","nsucc":"\u2281","nsucceq":"\u2AB0\u0338","nsup":"\u2285","nsupE":"\u2AC6\u0338","nsupe":"\u2289","nsupset":"\u2283\u20D2","nsupseteq":"\u2289","nsupseteqq":"\u2AC6\u0338","ntgl":"\u2279","Ntilde":"\u00D1","ntilde":"\u00F1","ntlg":"\u2278","ntriangleleft":"\u22EA","ntrianglelefteq":"\u22EC","ntriangleright":"\u22EB","ntrianglerighteq":"\u22ED","Nu":"\u039D","nu":"\u03BD","num":"#","numero":"\u2116","numsp":"\u2007","nvap":"\u224D\u20D2","nvdash":"\u22AC","nvDash":"\u22AD","nVdash":"\u22AE","nVDash":"\u22AF","nvge":"\u2265\u20D2","nvgt":">\u20D2","nvHarr":"\u2904","nvinfin":"\u29DE","nvlArr":"\u2902","nvle":"\u2264\u20D2","nvlt":"<\u20D2","nvltrie":"\u22B4\u20D2","nvrArr":"\u2903","nvrtrie":"\u22B5\u20D2","nvsim":"\u223C\u20D2","nwarhk":"\u2923","nwarr":"\u2196","nwArr":"\u21D6","nwarrow":"\u2196","nwnear":"\u2927","Oacute":"\u00D3","oacute":"\u00F3","oast":"\u229B","Ocirc":"\u00D4","ocirc":"\u00F4","ocir":"\u229A","Ocy":"\u041E","ocy":"\u043E","odash":"\u229D","Odblac":"\u0150","odblac":"\u0151","odiv":"\u2A38","odot":"\u2299","odsold":"\u29BC","OElig":"\u0152","oelig":"\u0153","ofcir":"\u29BF","Ofr":"\uD835\uDD12","ofr":"\uD835\uDD2C","ogon":"\u02DB","Ograve":"\u00D2","ograve":"\u00F2","ogt":"\u29C1","ohbar":"\u29B5","ohm":"\u03A9","oint":"\u222E","olarr":"\u21BA","olcir":"\u29BE","olcross":"\u29BB","oline":"\u203E","olt":"\u29C0","Omacr":"\u014C","omacr":"\u014D","Omega":"\u03A9","omega":"\u03C9","Omicron":"\u039F","omicron":"\u03BF","omid":"\u29B6","ominus":"\u2296","Oopf":"\uD835\uDD46","oopf":"\uD835\uDD60","opar":"\u29B7","OpenCurlyDoubleQuote":"\u201C","OpenCurlyQuote":"\u2018","operp":"\u29B9","oplus":"\u2295","orarr":"\u21BB","Or":"\u2A54","or":"\u2228","ord":"\u2A5D","order":"\u2134","orderof":"\u2134","ordf":"\u00AA","ordm":"\u00BA","origof":"\u22B6","oror":"\u2A56","orslope":"\u2A57","orv":"\u2A5B","oS":"\u24C8","Oscr":"\uD835\uDCAA","oscr":"\u2134","Oslash":"\u00D8","oslash":"\u00F8","osol":"\u2298","Otilde":"\u00D5","otilde":"\u00F5","otimesas":"\u2A36","Otimes":"\u2A37","otimes":"\u2297","Ouml":"\u00D6","ouml":"\u00F6","ovbar":"\u233D","OverBar":"\u203E","OverBrace":"\u23DE","OverBracket":"\u23B4","OverParenthesis":"\u23DC","para":"\u00B6","parallel":"\u2225","par":"\u2225","parsim":"\u2AF3","parsl":"\u2AFD","part":"\u2202","PartialD":"\u2202","Pcy":"\u041F","pcy":"\u043F","percnt":"%","period":".","permil":"\u2030","perp":"\u22A5","pertenk":"\u2031","Pfr":"\uD835\uDD13","pfr":"\uD835\uDD2D","Phi":"\u03A6","phi":"\u03C6","phiv":"\u03D5","phmmat":"\u2133","phone":"\u260E","Pi":"\u03A0","pi":"\u03C0","pitchfork":"\u22D4","piv":"\u03D6","planck":"\u210F","planckh":"\u210E","plankv":"\u210F","plusacir":"\u2A23","plusb":"\u229E","pluscir":"\u2A22","plus":"+","plusdo":"\u2214","plusdu":"\u2A25","pluse":"\u2A72","PlusMinus":"\u00B1","plusmn":"\u00B1","plussim":"\u2A26","plustwo":"\u2A27","pm":"\u00B1","Poincareplane":"\u210C","pointint":"\u2A15","popf":"\uD835\uDD61","Popf":"\u2119","pound":"\u00A3","prap":"\u2AB7","Pr":"\u2ABB","pr":"\u227A","prcue":"\u227C","precapprox":"\u2AB7","prec":"\u227A","preccurlyeq":"\u227C","Precedes":"\u227A","PrecedesEqual":"\u2AAF","PrecedesSlantEqual":"\u227C","PrecedesTilde":"\u227E","preceq":"\u2AAF","precnapprox":"\u2AB9","precneqq":"\u2AB5","precnsim":"\u22E8","pre":"\u2AAF","prE":"\u2AB3","precsim":"\u227E","prime":"\u2032","Prime":"\u2033","primes":"\u2119","prnap":"\u2AB9","prnE":"\u2AB5","prnsim":"\u22E8","prod":"\u220F","Product":"\u220F","profalar":"\u232E","profline":"\u2312","profsurf":"\u2313","prop":"\u221D","Proportional":"\u221D","Proportion":"\u2237","propto":"\u221D","prsim":"\u227E","prurel":"\u22B0","Pscr":"\uD835\uDCAB","pscr":"\uD835\uDCC5","Psi":"\u03A8","psi":"\u03C8","puncsp":"\u2008","Qfr":"\uD835\uDD14","qfr":"\uD835\uDD2E","qint":"\u2A0C","qopf":"\uD835\uDD62","Qopf":"\u211A","qprime":"\u2057","Qscr":"\uD835\uDCAC","qscr":"\uD835\uDCC6","quaternions":"\u210D","quatint":"\u2A16","quest":"?","questeq":"\u225F","quot":"\"","QUOT":"\"","rAarr":"\u21DB","race":"\u223D\u0331","Racute":"\u0154","racute":"\u0155","radic":"\u221A","raemptyv":"\u29B3","rang":"\u27E9","Rang":"\u27EB","rangd":"\u2992","range":"\u29A5","rangle":"\u27E9","raquo":"\u00BB","rarrap":"\u2975","rarrb":"\u21E5","rarrbfs":"\u2920","rarrc":"\u2933","rarr":"\u2192","Rarr":"\u21A0","rArr":"\u21D2","rarrfs":"\u291E","rarrhk":"\u21AA","rarrlp":"\u21AC","rarrpl":"\u2945","rarrsim":"\u2974","Rarrtl":"\u2916","rarrtl":"\u21A3","rarrw":"\u219D","ratail":"\u291A","rAtail":"\u291C","ratio":"\u2236","rationals":"\u211A","rbarr":"\u290D","rBarr":"\u290F","RBarr":"\u2910","rbbrk":"\u2773","rbrace":"}","rbrack":"]","rbrke":"\u298C","rbrksld":"\u298E","rbrkslu":"\u2990","Rcaron":"\u0158","rcaron":"\u0159","Rcedil":"\u0156","rcedil":"\u0157","rceil":"\u2309","rcub":"}","Rcy":"\u0420","rcy":"\u0440","rdca":"\u2937","rdldhar":"\u2969","rdquo":"\u201D","rdquor":"\u201D","rdsh":"\u21B3","real":"\u211C","realine":"\u211B","realpart":"\u211C","reals":"\u211D","Re":"\u211C","rect":"\u25AD","reg":"\u00AE","REG":"\u00AE","ReverseElement":"\u220B","ReverseEquilibrium":"\u21CB","ReverseUpEquilibrium":"\u296F","rfisht":"\u297D","rfloor":"\u230B","rfr":"\uD835\uDD2F","Rfr":"\u211C","rHar":"\u2964","rhard":"\u21C1","rharu":"\u21C0","rharul":"\u296C","Rho":"\u03A1","rho":"\u03C1","rhov":"\u03F1","RightAngleBracket":"\u27E9","RightArrowBar":"\u21E5","rightarrow":"\u2192","RightArrow":"\u2192","Rightarrow":"\u21D2","RightArrowLeftArrow":"\u21C4","rightarrowtail":"\u21A3","RightCeiling":"\u2309","RightDoubleBracket":"\u27E7","RightDownTeeVector":"\u295D","RightDownVectorBar":"\u2955","RightDownVector":"\u21C2","RightFloor":"\u230B","rightharpoondown":"\u21C1","rightharpoonup":"\u21C0","rightleftarrows":"\u21C4","rightleftharpoons":"\u21CC","rightrightarrows":"\u21C9","rightsquigarrow":"\u219D","RightTeeArrow":"\u21A6","RightTee":"\u22A2","RightTeeVector":"\u295B","rightthreetimes":"\u22CC","RightTriangleBar":"\u29D0","RightTriangle":"\u22B3","RightTriangleEqual":"\u22B5","RightUpDownVector":"\u294F","RightUpTeeVector":"\u295C","RightUpVectorBar":"\u2954","RightUpVector":"\u21BE","RightVectorBar":"\u2953","RightVector":"\u21C0","ring":"\u02DA","risingdotseq":"\u2253","rlarr":"\u21C4","rlhar":"\u21CC","rlm":"\u200F","rmoustache":"\u23B1","rmoust":"\u23B1","rnmid":"\u2AEE","roang":"\u27ED","roarr":"\u21FE","robrk":"\u27E7","ropar":"\u2986","ropf":"\uD835\uDD63","Ropf":"\u211D","roplus":"\u2A2E","rotimes":"\u2A35","RoundImplies":"\u2970","rpar":")","rpargt":"\u2994","rppolint":"\u2A12","rrarr":"\u21C9","Rrightarrow":"\u21DB","rsaquo":"\u203A","rscr":"\uD835\uDCC7","Rscr":"\u211B","rsh":"\u21B1","Rsh":"\u21B1","rsqb":"]","rsquo":"\u2019","rsquor":"\u2019","rthree":"\u22CC","rtimes":"\u22CA","rtri":"\u25B9","rtrie":"\u22B5","rtrif":"\u25B8","rtriltri":"\u29CE","RuleDelayed":"\u29F4","ruluhar":"\u2968","rx":"\u211E","Sacute":"\u015A","sacute":"\u015B","sbquo":"\u201A","scap":"\u2AB8","Scaron":"\u0160","scaron":"\u0161","Sc":"\u2ABC","sc":"\u227B","sccue":"\u227D","sce":"\u2AB0","scE":"\u2AB4","Scedil":"\u015E","scedil":"\u015F","Scirc":"\u015C","scirc":"\u015D","scnap":"\u2ABA","scnE":"\u2AB6","scnsim":"\u22E9","scpolint":"\u2A13","scsim":"\u227F","Scy":"\u0421","scy":"\u0441","sdotb":"\u22A1","sdot":"\u22C5","sdote":"\u2A66","searhk":"\u2925","searr":"\u2198","seArr":"\u21D8","searrow":"\u2198","sect":"\u00A7","semi":";","seswar":"\u2929","setminus":"\u2216","setmn":"\u2216","sext":"\u2736","Sfr":"\uD835\uDD16","sfr":"\uD835\uDD30","sfrown":"\u2322","sharp":"\u266F","SHCHcy":"\u0429","shchcy":"\u0449","SHcy":"\u0428","shcy":"\u0448","ShortDownArrow":"\u2193","ShortLeftArrow":"\u2190","shortmid":"\u2223","shortparallel":"\u2225","ShortRightArrow":"\u2192","ShortUpArrow":"\u2191","shy":"\u00AD","Sigma":"\u03A3","sigma":"\u03C3","sigmaf":"\u03C2","sigmav":"\u03C2","sim":"\u223C","simdot":"\u2A6A","sime":"\u2243","simeq":"\u2243","simg":"\u2A9E","simgE":"\u2AA0","siml":"\u2A9D","simlE":"\u2A9F","simne":"\u2246","simplus":"\u2A24","simrarr":"\u2972","slarr":"\u2190","SmallCircle":"\u2218","smallsetminus":"\u2216","smashp":"\u2A33","smeparsl":"\u29E4","smid":"\u2223","smile":"\u2323","smt":"\u2AAA","smte":"\u2AAC","smtes":"\u2AAC\uFE00","SOFTcy":"\u042C","softcy":"\u044C","solbar":"\u233F","solb":"\u29C4","sol":"/","Sopf":"\uD835\uDD4A","sopf":"\uD835\uDD64","spades":"\u2660","spadesuit":"\u2660","spar":"\u2225","sqcap":"\u2293","sqcaps":"\u2293\uFE00","sqcup":"\u2294","sqcups":"\u2294\uFE00","Sqrt":"\u221A","sqsub":"\u228F","sqsube":"\u2291","sqsubset":"\u228F","sqsubseteq":"\u2291","sqsup":"\u2290","sqsupe":"\u2292","sqsupset":"\u2290","sqsupseteq":"\u2292","square":"\u25A1","Square":"\u25A1","SquareIntersection":"\u2293","SquareSubset":"\u228F","SquareSubsetEqual":"\u2291","SquareSuperset":"\u2290","SquareSupersetEqual":"\u2292","SquareUnion":"\u2294","squarf":"\u25AA","squ":"\u25A1","squf":"\u25AA","srarr":"\u2192","Sscr":"\uD835\uDCAE","sscr":"\uD835\uDCC8","ssetmn":"\u2216","ssmile":"\u2323","sstarf":"\u22C6","Star":"\u22C6","star":"\u2606","starf":"\u2605","straightepsilon":"\u03F5","straightphi":"\u03D5","strns":"\u00AF","sub":"\u2282","Sub":"\u22D0","subdot":"\u2ABD","subE":"\u2AC5","sube":"\u2286","subedot":"\u2AC3","submult":"\u2AC1","subnE":"\u2ACB","subne":"\u228A","subplus":"\u2ABF","subrarr":"\u2979","subset":"\u2282","Subset":"\u22D0","subseteq":"\u2286","subseteqq":"\u2AC5","SubsetEqual":"\u2286","subsetneq":"\u228A","subsetneqq":"\u2ACB","subsim":"\u2AC7","subsub":"\u2AD5","subsup":"\u2AD3","succapprox":"\u2AB8","succ":"\u227B","succcurlyeq":"\u227D","Succeeds":"\u227B","SucceedsEqual":"\u2AB0","SucceedsSlantEqual":"\u227D","SucceedsTilde":"\u227F","succeq":"\u2AB0","succnapprox":"\u2ABA","succneqq":"\u2AB6","succnsim":"\u22E9","succsim":"\u227F","SuchThat":"\u220B","sum":"\u2211","Sum":"\u2211","sung":"\u266A","sup1":"\u00B9","sup2":"\u00B2","sup3":"\u00B3","sup":"\u2283","Sup":"\u22D1","supdot":"\u2ABE","supdsub":"\u2AD8","supE":"\u2AC6","supe":"\u2287","supedot":"\u2AC4","Superset":"\u2283","SupersetEqual":"\u2287","suphsol":"\u27C9","suphsub":"\u2AD7","suplarr":"\u297B","supmult":"\u2AC2","supnE":"\u2ACC","supne":"\u228B","supplus":"\u2AC0","supset":"\u2283","Supset":"\u22D1","supseteq":"\u2287","supseteqq":"\u2AC6","supsetneq":"\u228B","supsetneqq":"\u2ACC","supsim":"\u2AC8","supsub":"\u2AD4","supsup":"\u2AD6","swarhk":"\u2926","swarr":"\u2199","swArr":"\u21D9","swarrow":"\u2199","swnwar":"\u292A","szlig":"\u00DF","Tab":"\t","target":"\u2316","Tau":"\u03A4","tau":"\u03C4","tbrk":"\u23B4","Tcaron":"\u0164","tcaron":"\u0165","Tcedil":"\u0162","tcedil":"\u0163","Tcy":"\u0422","tcy":"\u0442","tdot":"\u20DB","telrec":"\u2315","Tfr":"\uD835\uDD17","tfr":"\uD835\uDD31","there4":"\u2234","therefore":"\u2234","Therefore":"\u2234","Theta":"\u0398","theta":"\u03B8","thetasym":"\u03D1","thetav":"\u03D1","thickapprox":"\u2248","thicksim":"\u223C","ThickSpace":"\u205F\u200A","ThinSpace":"\u2009","thinsp":"\u2009","thkap":"\u2248","thksim":"\u223C","THORN":"\u00DE","thorn":"\u00FE","tilde":"\u02DC","Tilde":"\u223C","TildeEqual":"\u2243","TildeFullEqual":"\u2245","TildeTilde":"\u2248","timesbar":"\u2A31","timesb":"\u22A0","times":"\u00D7","timesd":"\u2A30","tint":"\u222D","toea":"\u2928","topbot":"\u2336","topcir":"\u2AF1","top":"\u22A4","Topf":"\uD835\uDD4B","topf":"\uD835\uDD65","topfork":"\u2ADA","tosa":"\u2929","tprime":"\u2034","trade":"\u2122","TRADE":"\u2122","triangle":"\u25B5","triangledown":"\u25BF","triangleleft":"\u25C3","trianglelefteq":"\u22B4","triangleq":"\u225C","triangleright":"\u25B9","trianglerighteq":"\u22B5","tridot":"\u25EC","trie":"\u225C","triminus":"\u2A3A","TripleDot":"\u20DB","triplus":"\u2A39","trisb":"\u29CD","tritime":"\u2A3B","trpezium":"\u23E2","Tscr":"\uD835\uDCAF","tscr":"\uD835\uDCC9","TScy":"\u0426","tscy":"\u0446","TSHcy":"\u040B","tshcy":"\u045B","Tstrok":"\u0166","tstrok":"\u0167","twixt":"\u226C","twoheadleftarrow":"\u219E","twoheadrightarrow":"\u21A0","Uacute":"\u00DA","uacute":"\u00FA","uarr":"\u2191","Uarr":"\u219F","uArr":"\u21D1","Uarrocir":"\u2949","Ubrcy":"\u040E","ubrcy":"\u045E","Ubreve":"\u016C","ubreve":"\u016D","Ucirc":"\u00DB","ucirc":"\u00FB","Ucy":"\u0423","ucy":"\u0443","udarr":"\u21C5","Udblac":"\u0170","udblac":"\u0171","udhar":"\u296E","ufisht":"\u297E","Ufr":"\uD835\uDD18","ufr":"\uD835\uDD32","Ugrave":"\u00D9","ugrave":"\u00F9","uHar":"\u2963","uharl":"\u21BF","uharr":"\u21BE","uhblk":"\u2580","ulcorn":"\u231C","ulcorner":"\u231C","ulcrop":"\u230F","ultri":"\u25F8","Umacr":"\u016A","umacr":"\u016B","uml":"\u00A8","UnderBar":"_","UnderBrace":"\u23DF","UnderBracket":"\u23B5","UnderParenthesis":"\u23DD","Union":"\u22C3","UnionPlus":"\u228E","Uogon":"\u0172","uogon":"\u0173","Uopf":"\uD835\uDD4C","uopf":"\uD835\uDD66","UpArrowBar":"\u2912","uparrow":"\u2191","UpArrow":"\u2191","Uparrow":"\u21D1","UpArrowDownArrow":"\u21C5","updownarrow":"\u2195","UpDownArrow":"\u2195","Updownarrow":"\u21D5","UpEquilibrium":"\u296E","upharpoonleft":"\u21BF","upharpoonright":"\u21BE","uplus":"\u228E","UpperLeftArrow":"\u2196","UpperRightArrow":"\u2197","upsi":"\u03C5","Upsi":"\u03D2","upsih":"\u03D2","Upsilon":"\u03A5","upsilon":"\u03C5","UpTeeArrow":"\u21A5","UpTee":"\u22A5","upuparrows":"\u21C8","urcorn":"\u231D","urcorner":"\u231D","urcrop":"\u230E","Uring":"\u016E","uring":"\u016F","urtri":"\u25F9","Uscr":"\uD835\uDCB0","uscr":"\uD835\uDCCA","utdot":"\u22F0","Utilde":"\u0168","utilde":"\u0169","utri":"\u25B5","utrif":"\u25B4","uuarr":"\u21C8","Uuml":"\u00DC","uuml":"\u00FC","uwangle":"\u29A7","vangrt":"\u299C","varepsilon":"\u03F5","varkappa":"\u03F0","varnothing":"\u2205","varphi":"\u03D5","varpi":"\u03D6","varpropto":"\u221D","varr":"\u2195","vArr":"\u21D5","varrho":"\u03F1","varsigma":"\u03C2","varsubsetneq":"\u228A\uFE00","varsubsetneqq":"\u2ACB\uFE00","varsupsetneq":"\u228B\uFE00","varsupsetneqq":"\u2ACC\uFE00","vartheta":"\u03D1","vartriangleleft":"\u22B2","vartriangleright":"\u22B3","vBar":"\u2AE8","Vbar":"\u2AEB","vBarv":"\u2AE9","Vcy":"\u0412","vcy":"\u0432","vdash":"\u22A2","vDash":"\u22A8","Vdash":"\u22A9","VDash":"\u22AB","Vdashl":"\u2AE6","veebar":"\u22BB","vee":"\u2228","Vee":"\u22C1","veeeq":"\u225A","vellip":"\u22EE","verbar":"|","Verbar":"\u2016","vert":"|","Vert":"\u2016","VerticalBar":"\u2223","VerticalLine":"|","VerticalSeparator":"\u2758","VerticalTilde":"\u2240","VeryThinSpace":"\u200A","Vfr":"\uD835\uDD19","vfr":"\uD835\uDD33","vltri":"\u22B2","vnsub":"\u2282\u20D2","vnsup":"\u2283\u20D2","Vopf":"\uD835\uDD4D","vopf":"\uD835\uDD67","vprop":"\u221D","vrtri":"\u22B3","Vscr":"\uD835\uDCB1","vscr":"\uD835\uDCCB","vsubnE":"\u2ACB\uFE00","vsubne":"\u228A\uFE00","vsupnE":"\u2ACC\uFE00","vsupne":"\u228B\uFE00","Vvdash":"\u22AA","vzigzag":"\u299A","Wcirc":"\u0174","wcirc":"\u0175","wedbar":"\u2A5F","wedge":"\u2227","Wedge":"\u22C0","wedgeq":"\u2259","weierp":"\u2118","Wfr":"\uD835\uDD1A","wfr":"\uD835\uDD34","Wopf":"\uD835\uDD4E","wopf":"\uD835\uDD68","wp":"\u2118","wr":"\u2240","wreath":"\u2240","Wscr":"\uD835\uDCB2","wscr":"\uD835\uDCCC","xcap":"\u22C2","xcirc":"\u25EF","xcup":"\u22C3","xdtri":"\u25BD","Xfr":"\uD835\uDD1B","xfr":"\uD835\uDD35","xharr":"\u27F7","xhArr":"\u27FA","Xi":"\u039E","xi":"\u03BE","xlarr":"\u27F5","xlArr":"\u27F8","xmap":"\u27FC","xnis":"\u22FB","xodot":"\u2A00","Xopf":"\uD835\uDD4F","xopf":"\uD835\uDD69","xoplus":"\u2A01","xotime":"\u2A02","xrarr":"\u27F6","xrArr":"\u27F9","Xscr":"\uD835\uDCB3","xscr":"\uD835\uDCCD","xsqcup":"\u2A06","xuplus":"\u2A04","xutri":"\u25B3","xvee":"\u22C1","xwedge":"\u22C0","Yacute":"\u00DD","yacute":"\u00FD","YAcy":"\u042F","yacy":"\u044F","Ycirc":"\u0176","ycirc":"\u0177","Ycy":"\u042B","ycy":"\u044B","yen":"\u00A5","Yfr":"\uD835\uDD1C","yfr":"\uD835\uDD36","YIcy":"\u0407","yicy":"\u0457","Yopf":"\uD835\uDD50","yopf":"\uD835\uDD6A","Yscr":"\uD835\uDCB4","yscr":"\uD835\uDCCE","YUcy":"\u042E","yucy":"\u044E","yuml":"\u00FF","Yuml":"\u0178","Zacute":"\u0179","zacute":"\u017A","Zcaron":"\u017D","zcaron":"\u017E","Zcy":"\u0417","zcy":"\u0437","Zdot":"\u017B","zdot":"\u017C","zeetrf":"\u2128","ZeroWidthSpace":"\u200B","Zeta":"\u0396","zeta":"\u03B6","zfr":"\uD835\uDD37","Zfr":"\u2128","ZHcy":"\u0416","zhcy":"\u0436","zigrarr":"\u21DD","zopf":"\uD835\uDD6B","Zopf":"\u2124","Zscr":"\uD835\uDCB5","zscr":"\uD835\uDCCF","zwj":"\u200D","zwnj":"\u200C"}
+},{}],4:[function(require,module,exports){
+/**
+ * This is the main entry point for KaTeX. Here, we expose functions for
+ * rendering expressions either to DOM nodes or to markup strings.
+ *
+ * We also expose the ParseError class to check if errors thrown from KaTeX are
+ * errors in the expression, or errors in javascript handling.
+ */
+
+var ParseError = require("./src/ParseError");
+var Settings = require("./src/Settings");
+
+var buildTree = require("./src/buildTree");
+var parseTree = require("./src/parseTree");
+var utils = require("./src/utils");
+
+/**
+ * Parse and build an expression, and place that expression in the DOM node
+ * given.
+ */
+var render = function(expression, baseNode, options) {
+    utils.clearNode(baseNode);
+
+    var settings = new Settings(options);
+
+    var tree = parseTree(expression, settings);
+    var node = buildTree(tree, expression, settings).toNode();
+
+    baseNode.appendChild(node);
+};
+
+// KaTeX's styles don't work properly in quirks mode. Print out an error, and
+// disable rendering.
+if (typeof document !== "undefined") {
+    if (document.compatMode !== "CSS1Compat") {
+        typeof console !== "undefined" && console.warn(
+            "Warning: KaTeX doesn't work in quirks mode. Make sure your " +
+                "website has a suitable doctype.");
+
+        render = function() {
+            throw new ParseError("KaTeX doesn't work in quirks mode.");
+        };
+    }
+}
+
+/**
+ * Parse and build an expression, and return the markup for that.
+ */
+var renderToString = function(expression, options) {
+    var settings = new Settings(options);
+
+    var tree = parseTree(expression, settings);
+    return buildTree(tree, expression, settings).toMarkup();
+};
+
+/**
+ * Parse an expression and return the parse tree.
+ */
+var generateParseTree = function(expression, options) {
+    var settings = new Settings(options);
+    return parseTree(expression, settings);
+};
+
+module.exports = {
+    render: render,
+    renderToString: renderToString,
+    /**
+     * NOTE: This method is not currently recommended for public use.
+     * The internal tree representation is unstable and is very likely
+     * to change. Use at your own risk.
+     */
+    __parse: generateParseTree,
+    ParseError: ParseError
+};
+
+},{"./src/ParseError":7,"./src/Settings":9,"./src/buildTree":14,"./src/parseTree":23,"./src/utils":25}],5:[function(require,module,exports){
+/**
+ * The Lexer class handles tokenizing the input in various ways. Since our
+ * parser expects us to be able to backtrack, the lexer allows lexing from any
+ * given starting point.
+ *
+ * Its main exposed function is the `lex` function, which takes a position to
+ * lex from and a type of token to lex. It defers to the appropriate `_innerLex`
+ * function.
+ *
+ * The various `_innerLex` functions perform the actual lexing of different
+ * kinds.
+ */
+
+var matchAt = require("match-at");
+
+var ParseError = require("./ParseError");
+
+// The main lexer class
+function Lexer(input) {
+    this._input = input;
+}
+
+// The resulting token returned from `lex`.
+function Token(text, data, position) {
+    this.text = text;
+    this.data = data;
+    this.position = position;
+}
+
+// "normal" types of tokens. These are tokens which can be matched by a simple
+// regex
+var mathNormals = [
+    /[/|@.""`0-9a-zA-Z]/, // ords
+    /[*+-]/, // bins
+    /[=<>:]/, // rels
+    /[,;]/, // punctuation
+    /['\^_{}]/, // misc
+    /[(\[]/, // opens
+    /[)\]?!]/, // closes
+    /~/, // spacing
+    /&/, // horizontal alignment
+    /\\\\/ // line break
+];
+
+// These are "normal" tokens like above, but should instead be parsed in text
+// mode.
+var textNormals = [
+    /[a-zA-Z0-9`!@*()-=+\[\]'";:?\/.,]/, // ords
+    /[{}]/, // grouping
+    /~/, // spacing
+    /&/, // horizontal alignment
+    /\\\\/ // line break
+];
+
+// Regexes for matching whitespace
+var whitespaceRegex = /\s*/;
+var whitespaceConcatRegex = / +|\\  +/;
+
+// This regex matches any other TeX function, which is a backslash followed by a
+// word or a single symbol
+var anyFunc = /\\(?:[a-zA-Z]+|.)/;
+
+/**
+ * This function lexes a single normal token. It takes a position, a list of
+ * "normal" tokens to try, and whether it should completely ignore whitespace or
+ * not.
+ */
+Lexer.prototype._innerLex = function(pos, normals, ignoreWhitespace) {
+    var input = this._input;
+    var whitespace;
+
+    if (ignoreWhitespace) {
+        // Get rid of whitespace.
+        whitespace = matchAt(whitespaceRegex, input, pos)[0];
+        pos += whitespace.length;
+    } else {
+        // Do the funky concatenation of whitespace that happens in text mode.
+        whitespace = matchAt(whitespaceConcatRegex, input, pos);
+        if (whitespace !== null) {
+            return new Token(" ", null, pos + whitespace[0].length);
+        }
+    }
+
+    // If there's no more input to parse, return an EOF token
+    if (pos === input.length) {
+        return new Token("EOF", null, pos);
+    }
+
+    var match;
+    if ((match = matchAt(anyFunc, input, pos))) {
+        // If we match a function token, return it
+        return new Token(match[0], null, pos + match[0].length);
+    } else {
+        // Otherwise, we look through the normal token regexes and see if it's
+        // one of them.
+        for (var i = 0; i < normals.length; i++) {
+            var normal = normals[i];
+
+            if ((match = matchAt(normal, input, pos))) {
+                // If it is, return it
+                return new Token(
+                    match[0], null, pos + match[0].length);
+            }
+        }
+    }
+
+    throw new ParseError(
+            "Unexpected character: '" + input[pos] + "'",
+            this, pos);
+};
+
+// A regex to match a CSS color (like #ffffff or BlueViolet)
+var cssColor = /#[a-z0-9]+|[a-z]+/i;
+
+/**
+ * This function lexes a CSS color.
+ */
+Lexer.prototype._innerLexColor = function(pos) {
+    var input = this._input;
+
+    // Ignore whitespace
+    var whitespace = matchAt(whitespaceRegex, input, pos)[0];
+    pos += whitespace.length;
+
+    var match;
+    if ((match = matchAt(cssColor, input, pos))) {
+        // If we look like a color, return a color
+        return new Token(match[0], null, pos + match[0].length);
+    } else {
+        throw new ParseError("Invalid color", this, pos);
+    }
+};
+
+// A regex to match a dimension. Dimensions look like
+// "1.2em" or ".4pt" or "1 ex"
+var sizeRegex = /(-?)\s*(\d+(?:\.\d*)?|\.\d+)\s*([a-z]{2})/;
+
+/**
+ * This function lexes a dimension.
+ */
+Lexer.prototype._innerLexSize = function(pos) {
+    var input = this._input;
+
+    // Ignore whitespace
+    var whitespace = matchAt(whitespaceRegex, input, pos)[0];
+    pos += whitespace.length;
+
+    var match;
+    if ((match = matchAt(sizeRegex, input, pos))) {
+        var unit = match[3];
+        // We only currently handle "em" and "ex" units
+        if (unit !== "em" && unit !== "ex") {
+            throw new ParseError("Invalid unit: '" + unit + "'", this, pos);
+        }
+        return new Token(match[0], {
+                number: +(match[1] + match[2]),
+                unit: unit
+            }, pos + match[0].length);
+    }
+
+    throw new ParseError("Invalid size", this, pos);
+};
+
+/**
+ * This function lexes a string of whitespace.
+ */
+Lexer.prototype._innerLexWhitespace = function(pos) {
+    var input = this._input;
+
+    var whitespace = matchAt(whitespaceRegex, input, pos)[0];
+    pos += whitespace.length;
+
+    return new Token(whitespace[0], null, pos);
+};
+
+/**
+ * This function lexes a single token starting at `pos` and of the given mode.
+ * Based on the mode, we defer to one of the `_innerLex` functions.
+ */
+Lexer.prototype.lex = function(pos, mode) {
+    if (mode === "math") {
+        return this._innerLex(pos, mathNormals, true);
+    } else if (mode === "text") {
+        return this._innerLex(pos, textNormals, false);
+    } else if (mode === "color") {
+        return this._innerLexColor(pos);
+    } else if (mode === "size") {
+        return this._innerLexSize(pos);
+    } else if (mode === "whitespace") {
+        return this._innerLexWhitespace(pos);
+    }
+};
+
+module.exports = Lexer;
+
+},{"./ParseError":7,"match-at":80}],6:[function(require,module,exports){
+/**
+ * This file contains information about the options that the Parser carries
+ * around with it while parsing. Data is held in an `Options` object, and when
+ * recursing, a new `Options` object can be created with the `.with*` and
+ * `.reset` functions.
+ */
+
+/**
+ * This is the main options class. It contains the style, size, color, and font
+ * of the current parse level. It also contains the style and size of the parent
+ * parse level, so size changes can be handled efficiently.
+ *
+ * Each of the `.with*` and `.reset` functions passes its current style and size
+ * as the parentStyle and parentSize of the new options class, so parent
+ * handling is taken care of automatically.
+ */
+function Options(data) {
+    this.style = data.style;
+    this.color = data.color;
+    this.size = data.size;
+    this.phantom = data.phantom;
+    this.font = data.font;
+
+    if (data.parentStyle === undefined) {
+        this.parentStyle = data.style;
+    } else {
+        this.parentStyle = data.parentStyle;
+    }
+
+    if (data.parentSize === undefined) {
+        this.parentSize = data.size;
+    } else {
+        this.parentSize = data.parentSize;
+    }
+}
+
+/**
+ * Returns a new options object with the same properties as "this".  Properties
+ * from "extension" will be copied to the new options object.
+ */
+Options.prototype.extend = function(extension) {
+    var data = {
+        style: this.style,
+        size: this.size,
+        color: this.color,
+        parentStyle: this.style,
+        parentSize: this.size,
+        phantom: this.phantom,
+        font: this.font
+    };
+
+    for (var key in extension) {
+        if (extension.hasOwnProperty(key)) {
+            data[key] = extension[key];
+        }
+    }
+
+    return new Options(data);
+};
+
+/**
+ * Create a new options object with the given style.
+ */
+Options.prototype.withStyle = function(style) {
+    return this.extend({
+        style: style
+    });
+};
+
+/**
+ * Create a new options object with the given size.
+ */
+Options.prototype.withSize = function(size) {
+    return this.extend({
+        size: size
+    });
+};
+
+/**
+ * Create a new options object with the given color.
+ */
+Options.prototype.withColor = function(color) {
+    return this.extend({
+        color: color
+    });
+};
+
+/**
+ * Create a new options object with "phantom" set to true.
+ */
+Options.prototype.withPhantom = function() {
+    return this.extend({
+        phantom: true
+    });
+};
+
+/**
+ * Create a new options objects with the give font.
+ */
+Options.prototype.withFont = function(font) {
+    return this.extend({
+        font: font
+    });
+};
+
+/**
+ * Create a new options object with the same style, size, and color. This is
+ * used so that parent style and size changes are handled correctly.
+ */
+Options.prototype.reset = function() {
+    return this.extend({});
+};
+
+/**
+ * A map of color names to CSS colors.
+ * TODO(emily): Remove this when we have real macros
+ */
+var colorMap = {
+    "katex-blue": "#6495ed",
+    "katex-orange": "#ffa500",
+    "katex-pink": "#ff00af",
+    "katex-red": "#df0030",
+    "katex-green": "#28ae7b",
+    "katex-gray": "gray",
+    "katex-purple": "#9d38bd",
+    "katex-blueA": "#c7e9f1",
+    "katex-blueB": "#9cdceb",
+    "katex-blueC": "#58c4dd",
+    "katex-blueD": "#29abca",
+    "katex-blueE": "#1c758a",
+    "katex-tealA": "#acead7",
+    "katex-tealB": "#76ddc0",
+    "katex-tealC": "#5cd0b3",
+    "katex-tealD": "#55c1a7",
+    "katex-tealE": "#49a88f",
+    "katex-greenA": "#c9e2ae",
+    "katex-greenB": "#a6cf8c",
+    "katex-greenC": "#83c167",
+    "katex-greenD": "#77b05d",
+    "katex-greenE": "#699c52",
+    "katex-goldA": "#f7c797",
+    "katex-goldB": "#f9b775",
+    "katex-goldC": "#f0ac5f",
+    "katex-goldD": "#e1a158",
+    "katex-goldE": "#c78d46",
+    "katex-redA": "#f7a1a3",
+    "katex-redB": "#ff8080",
+    "katex-redC": "#fc6255",
+    "katex-redD": "#e65a4c",
+    "katex-redE": "#cf5044",
+    "katex-maroonA": "#ecabc1",
+    "katex-maroonB": "#ec92ab",
+    "katex-maroonC": "#c55f73",
+    "katex-maroonD": "#a24d61",
+    "katex-maroonE": "#94424f",
+    "katex-purpleA": "#caa3e8",
+    "katex-purpleB": "#b189c6",
+    "katex-purpleC": "#9a72ac",
+    "katex-purpleD": "#715582",
+    "katex-purpleE": "#644172",
+    "katex-mintA": "#f5f9e8",
+    "katex-mintB": "#edf2df",
+    "katex-mintC": "#e0e5cc",
+    "katex-grayA": "#fdfdfd",
+    "katex-grayB": "#f7f7f7",
+    "katex-grayC": "#eeeeee",
+    "katex-grayD": "#dddddd",
+    "katex-grayE": "#cccccc",
+    "katex-grayF": "#aaaaaa",
+    "katex-grayG": "#999999",
+    "katex-grayH": "#555555",
+    "katex-grayI": "#333333",
+    "katex-kaBlue": "#314453",
+    "katex-kaGreen": "#639b24"
+};
+
+/**
+ * Gets the CSS color of the current options object, accounting for the
+ * `colorMap`.
+ */
+Options.prototype.getColor = function() {
+    if (this.phantom) {
+        return "transparent";
+    } else {
+        return colorMap[this.color] || this.color;
+    }
+};
+
+module.exports = Options;
+
+},{}],7:[function(require,module,exports){
+/**
+ * This is the ParseError class, which is the main error thrown by KaTeX
+ * functions when something has gone wrong. This is used to distinguish internal
+ * errors from errors in the expression that the user provided.
+ */
+function ParseError(message, lexer, position) {
+    var error = "KaTeX parse error: " + message;
+
+    if (lexer !== undefined && position !== undefined) {
+        // If we have the input and a position, make the error a bit fancier
+
+        // Prepend some information
+        error += " at position " + position + ": ";
+
+        // Get the input
+        var input = lexer._input;
+        // Insert a combining underscore at the correct position
+        input = input.slice(0, position) + "\u0332" +
+            input.slice(position);
+
+        // Extract some context from the input and add it to the error
+        var begin = Math.max(0, position - 15);
+        var end = position + 15;
+        error += input.slice(begin, end);
+    }
+
+    // Some hackery to make ParseError a prototype of Error
+    // See http://stackoverflow.com/a/8460753
+    var self = new Error(error);
+    self.name = "ParseError";
+    self.__proto__ = ParseError.prototype;
+
+    self.position = position;
+    return self;
+}
+
+// More hackery
+ParseError.prototype.__proto__ = Error.prototype;
+
+module.exports = ParseError;
+
+},{}],8:[function(require,module,exports){
+var functions = require("./functions");
+var environments = require("./environments");
+var Lexer = require("./Lexer");
+var symbols = require("./symbols");
+var utils = require("./utils");
+
+var parseData = require("./parseData");
+var ParseError = require("./ParseError");
+
+/**
+ * This file contains the parser used to parse out a TeX expression from the
+ * input. Since TeX isn't context-free, standard parsers don't work particularly
+ * well.
+ *
+ * The strategy of this parser is as such:
+ *
+ * The main functions (the `.parse...` ones) take a position in the current
+ * parse string to parse tokens from. The lexer (found in Lexer.js, stored at
+ * this.lexer) also supports pulling out tokens at arbitrary places. When
+ * individual tokens are needed at a position, the lexer is called to pull out a
+ * token, which is then used.
+ *
+ * The main functions also take a mode that the parser is currently in
+ * (currently "math" or "text"), which denotes whether the current environment
+ * is a math-y one or a text-y one (e.g. inside \text). Currently, this serves
+ * to limit the functions which can be used in text mode.
+ *
+ * The main functions then return an object which contains the useful data that
+ * was parsed at its given point, and a new position at the end of the parsed
+ * data. The main functions can call each other and continue the parsing by
+ * using the returned position as a new starting point.
+ *
+ * There are also extra `.handle...` functions, which pull out some reused
+ * functionality into self-contained functions.
+ *
+ * The earlier functions return `ParseResult`s, which contain a ParseNode and a
+ * new position.
+ *
+ * The later functions (which are called deeper in the parse) sometimes return
+ * ParseFuncOrArgument, which contain a ParseResult as well as some data about
+ * whether the parsed object is a function which is missing some arguments, or a
+ * standalone object which can be used as an argument to another function.
+ */
+
+/**
+ * Main Parser class
+ */
+function Parser(input, settings) {
+    // Make a new lexer
+    this.lexer = new Lexer(input);
+    // Store the settings for use in parsing
+    this.settings = settings;
+}
+
+var ParseNode = parseData.ParseNode;
+var ParseResult = parseData.ParseResult;
+
+/**
+ * An initial function (without its arguments), or an argument to a function.
+ * The `result` argument should be a ParseResult.
+ */
+function ParseFuncOrArgument(result, isFunction) {
+    this.result = result;
+    // Is this a function (i.e. is it something defined in functions.js)?
+    this.isFunction = isFunction;
+}
+
+/**
+ * Checks a result to make sure it has the right type, and throws an
+ * appropriate error otherwise.
+ */
+Parser.prototype.expect = function(result, text) {
+    if (result.text !== text) {
+        throw new ParseError(
+            "Expected '" + text + "', got '" + result.text + "'",
+            this.lexer, result.position
+        );
+    }
+};
+
+/**
+ * Main parsing function, which parses an entire input.
+ *
+ * @return {?Array.<ParseNode>}
+ */
+Parser.prototype.parse = function(input) {
+    // Try to parse the input
+    var parse = this.parseInput(0, "math");
+    return parse.result;
+};
+
+/**
+ * Parses an entire input tree.
+ */
+Parser.prototype.parseInput = function(pos, mode) {
+    // Parse an expression
+    var expression = this.parseExpression(pos, mode, false);
+    // If we succeeded, make sure there's an EOF at the end
+    this.expect(expression.peek, "EOF");
+    return expression;
+};
+
+var endOfExpression = ["}", "\\end", "\\right", "&", "\\\\", "\\cr"];
+
+/**
+ * Parses an "expression", which is a list of atoms.
+ *
+ * @param {boolean} breakOnInfix Should the parsing stop when we hit infix
+ *                  nodes? This happens when functions have higher precendence
+ *                  than infix nodes in implicit parses.
+ *
+ * @param {?string} breakOnToken The token that the expression should end with,
+ *                  or `null` if something else should end the expression.
+ *
+ * @return {ParseResult}
+ */
+Parser.prototype.parseExpression = function(pos, mode, breakOnInfix, breakOnToken) {
+    var body = [];
+    var lex = null;
+    // Keep adding atoms to the body until we can't parse any more atoms (either
+    // we reached the end, a }, or a \right)
+    while (true) {
+        lex = this.lexer.lex(pos, mode);
+        if (endOfExpression.indexOf(lex.text) !== -1) {
+            break;
+        }
+        if (breakOnToken && lex.text === breakOnToken) {
+            break;
+        }
+        var atom = this.parseAtom(pos, mode);
+        if (!atom) {
+            if (!this.settings.throwOnError && lex.text[0] === "\\") {
+                var errorNode = this.handleUnsupportedCmd(lex.text, mode);
+                body.push(errorNode);
+
+                pos = lex.position;
+                continue;
+            }
+
+            break;
+        }
+        if (breakOnInfix && atom.result.type === "infix") {
+            break;
+        }
+        body.push(atom.result);
+        pos = atom.position;
+    }
+    var res = new ParseResult(this.handleInfixNodes(body, mode), pos);
+    res.peek = lex;
+    return res;
+};
+
+/**
+ * Rewrites infix operators such as \over with corresponding commands such
+ * as \frac.
+ *
+ * There can only be one infix operator per group.  If there's more than one
+ * then the expression is ambiguous.  This can be resolved by adding {}.
+ *
+ * @returns {Array}
+ */
+Parser.prototype.handleInfixNodes = function (body, mode) {
+    var overIndex = -1;
+    var func;
+    var funcName;
+
+    for (var i = 0; i < body.length; i++) {
+        var node = body[i];
+        if (node.type === "infix") {
+            if (overIndex !== -1) {
+                throw new ParseError("only one infix operator per group",
+                    this.lexer, -1);
+            }
+            overIndex = i;
+            funcName = node.value.replaceWith;
+            func = functions.funcs[funcName];
+        }
+    }
+
+    if (overIndex !== -1) {
+        var numerNode, denomNode;
+
+        var numerBody = body.slice(0, overIndex);
+        var denomBody = body.slice(overIndex + 1);
+
+        if (numerBody.length === 1 && numerBody[0].type === "ordgroup") {
+            numerNode = numerBody[0];
+        } else {
+            numerNode = new ParseNode("ordgroup", numerBody, mode);
+        }
+
+        if (denomBody.length === 1 && denomBody[0].type === "ordgroup") {
+            denomNode = denomBody[0];
+        } else {
+            denomNode = new ParseNode("ordgroup", denomBody, mode);
+        }
+
+        var value = func.handler(funcName, numerNode, denomNode);
+        return [new ParseNode(value.type, value, mode)];
+    } else {
+        return body;
+    }
+};
+
+// The greediness of a superscript or subscript
+var SUPSUB_GREEDINESS = 1;
+
+/**
+ * Handle a subscript or superscript with nice errors.
+ */
+Parser.prototype.handleSupSubscript = function(pos, mode, symbol, name) {
+    var group = this.parseGroup(pos, mode);
+
+    if (!group) {
+        var lex = this.lexer.lex(pos, mode);
+
+        if (!this.settings.throwOnError && lex.text[0] === "\\") {
+            return new ParseResult(
+                this.handleUnsupportedCmd(lex.text, mode),
+                lex.position);
+        } else {
+            throw new ParseError(
+                "Expected group after '" + symbol + "'", this.lexer, pos);
+        }
+    } else if (group.isFunction) {
+        // ^ and _ have a greediness, so handle interactions with functions'
+        // greediness
+        var funcGreediness = functions.funcs[group.result.result].greediness;
+        if (funcGreediness > SUPSUB_GREEDINESS) {
+            return this.parseFunction(pos, mode);
+        } else {
+            throw new ParseError(
+                "Got function '" + group.result.result + "' with no arguments " +
+                    "as " + name,
+                this.lexer, pos);
+        }
+    } else {
+        return group.result;
+    }
+};
+
+/**
+ * Converts the textual input of an unsupported command into a text node
+ * contained within a color node whose color is determined by errorColor
+ */
+ Parser.prototype.handleUnsupportedCmd = function(text, mode) {
+     var textordArray = [];
+
+     for (var i = 0; i < text.length; i++) {
+        textordArray.push(new ParseNode("textord", text[i], "text"));
+     }
+
+     var textNode = new ParseNode(
+         "text",
+         {
+             body: textordArray,
+             type: "text"
+         },
+         mode);
+
+     var colorNode = new ParseNode(
+        "color",
+        {
+            color: this.settings.errorColor,
+            value: [textNode],
+            type: "color"
+        },
+        mode);
+
+     return colorNode;
+ };
+
+/**
+ * Parses a group with optional super/subscripts.
+ *
+ * @return {?ParseResult}
+ */
+Parser.prototype.parseAtom = function(pos, mode) {
+    // The body of an atom is an implicit group, so that things like
+    // \left(x\right)^2 work correctly.
+    var base = this.parseImplicitGroup(pos, mode);
+
+    // In text mode, we don't have superscripts or subscripts
+    if (mode === "text") {
+        return base;
+    }
+
+    // Handle an empty base
+    var currPos;
+    if (!base) {
+        currPos = pos;
+        base = undefined;
+    } else {
+        currPos = base.position;
+    }
+
+    var superscript;
+    var subscript;
+    var result;
+    while (true) {
+        // Lex the first token
+        var lex = this.lexer.lex(currPos, mode);
+
+        if (lex.text === "\\limits" || lex.text === "\\nolimits") {
+            // We got a limit control
+            if (!base || base.result.type !== "op") {
+                throw new ParseError("Limit controls must follow a math operator",
+                    this.lexer, currPos);
+            }
+            else {
+                var limits = lex.text === "\\limits";
+                base.result.value.limits = limits;
+                base.result.value.alwaysHandleSupSub = true;
+                currPos = lex.position;
+            }
+        } else if (lex.text === "^") {
+            // We got a superscript start
+            if (superscript) {
+                throw new ParseError(
+                    "Double superscript", this.lexer, currPos);
+            }
+            result = this.handleSupSubscript(
+                lex.position, mode, lex.text, "superscript");
+            currPos = result.position;
+            superscript = result.result;
+        } else if (lex.text === "_") {
+            // We got a subscript start
+            if (subscript) {
+                throw new ParseError(
+                    "Double subscript", this.lexer, currPos);
+            }
+            result = this.handleSupSubscript(
+                lex.position, mode, lex.text, "subscript");
+            currPos = result.position;
+            subscript = result.result;
+        } else if (lex.text === "'") {
+            // We got a prime
+            var prime = new ParseNode("textord", "\\prime", mode);
+
+            // Many primes can be grouped together, so we handle this here
+            var primes = [prime];
+            currPos = lex.position;
+            // Keep lexing tokens until we get something that's not a prime
+            while ((lex = this.lexer.lex(currPos, mode)).text === "'") {
+                // For each one, add another prime to the list
+                primes.push(prime);
+                currPos = lex.position;
+            }
+            // Put them into an ordgroup as the superscript
+            superscript = new ParseNode("ordgroup", primes, mode);
+        } else {
+            // If it wasn't ^, _, or ', stop parsing super/subscripts
+            break;
+        }
+    }
+
+    if (superscript || subscript) {
+        // If we got either a superscript or subscript, create a supsub
+        return new ParseResult(
+            new ParseNode("supsub", {
+                base: base && base.result,
+                sup: superscript,
+                sub: subscript
+            }, mode),
+            currPos);
+    } else {
+        // Otherwise return the original body
+        return base;
+    }
+};
+
+// A list of the size-changing functions, for use in parseImplicitGroup
+var sizeFuncs = [
+    "\\tiny", "\\scriptsize", "\\footnotesize", "\\small", "\\normalsize",
+    "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge"
+];
+
+// A list of the style-changing functions, for use in parseImplicitGroup
+var styleFuncs = [
+    "\\displaystyle", "\\textstyle", "\\scriptstyle", "\\scriptscriptstyle"
+];
+
+/**
+ * Parses an implicit group, which is a group that starts at the end of a
+ * specified, and ends right before a higher explicit group ends, or at EOL. It
+ * is used for functions that appear to affect the current style, like \Large or
+ * \textrm, where instead of keeping a style we just pretend that there is an
+ * implicit grouping after it until the end of the group. E.g.
+ *   small text {\Large large text} small text again
+ * It is also used for \left and \right to get the correct grouping.
+ *
+ * @return {?ParseResult}
+ */
+Parser.prototype.parseImplicitGroup = function(pos, mode) {
+    var start = this.parseSymbol(pos, mode);
+
+    if (!start || !start.result) {
+        // If we didn't get anything we handle, fall back to parseFunction
+        return this.parseFunction(pos, mode);
+    }
+
+    var func = start.result.result;
+    var body;
+
+    if (func === "\\left") {
+        // If we see a left:
+        // Parse the entire left function (including the delimiter)
+        var left = this.parseFunction(pos, mode);
+        // Parse out the implicit body
+        body = this.parseExpression(left.position, mode, false);
+        // Check the next token
+        this.expect(body.peek, "\\right");
+        var right = this.parseFunction(body.position, mode);
+        return new ParseResult(
+            new ParseNode("leftright", {
+                body: body.result,
+                left: left.result.value.value,
+                right: right.result.value.value
+            }, mode),
+            right.position);
+    } else if (func === "\\begin") {
+        // begin...end is similar to left...right
+        var begin = this.parseFunction(pos, mode);
+        var envName = begin.result.value.name;
+        if (!environments.hasOwnProperty(envName)) {
+            throw new ParseError(
+                "No such environment: " + envName,
+                this.lexer, begin.result.value.namepos);
+        }
+        // Build the environment object. Arguments and other information will
+        // be made available to the begin and end methods using properties.
+        var env = environments[envName];
+        var args = [null, mode, envName];
+        var newPos = this.parseArguments(
+            begin.position, mode, "\\begin{" + envName + "}", env, args);
+        args[0] = newPos;
+        var result = env.handler.apply(this, args);
+        var endLex = this.lexer.lex(result.position, mode);
+        this.expect(endLex, "\\end");
+        var end = this.parseFunction(result.position, mode);
+        if (end.result.value.name !== envName) {
+            throw new ParseError(
+                "Mismatch: \\begin{" + envName + "} matched " +
+                "by \\end{" + end.result.value.name + "}",
+                this.lexer, end.namepos);
+        }
+        result.position = end.position;
+        return result;
+    } else if (utils.contains(sizeFuncs, func)) {
+        // If we see a sizing function, parse out the implict body
+        body = this.parseExpression(start.result.position, mode, false);
+        return new ParseResult(
+            new ParseNode("sizing", {
+                // Figure out what size to use based on the list of functions above
+                size: "size" + (utils.indexOf(sizeFuncs, func) + 1),
+                value: body.result
+            }, mode),
+            body.position);
+    } else if (utils.contains(styleFuncs, func)) {
+        // If we see a styling function, parse out the implict body
+        body = this.parseExpression(start.result.position, mode, true);
+        return new ParseResult(
+            new ParseNode("styling", {
+                // Figure out what style to use by pulling out the style from
+                // the function name
+                style: func.slice(1, func.length - 5),
+                value: body.result
+            }, mode),
+            body.position);
+    } else {
+        // Defer to parseFunction if it's not a function we handle
+        return this.parseFunction(pos, mode);
+    }
+};
+
+/**
+ * Parses an entire function, including its base and all of its arguments
+ *
+ * @return {?ParseResult}
+ */
+Parser.prototype.parseFunction = function(pos, mode) {
+    var baseGroup = this.parseGroup(pos, mode);
+
+    if (baseGroup) {
+        if (baseGroup.isFunction) {
+            var func = baseGroup.result.result;
+            var funcData = functions.funcs[func];
+            if (mode === "text" && !funcData.allowedInText) {
+                throw new ParseError(
+                    "Can't use function '" + func + "' in text mode",
+                    this.lexer, baseGroup.position);
+            }
+
+            var args = [func];
+            var newPos = this.parseArguments(
+                baseGroup.result.position, mode, func, funcData, args);
+            var result = functions.funcs[func].handler.apply(this, args);
+            return new ParseResult(
+                new ParseNode(result.type, result, mode),
+                newPos);
+        } else {
+            return baseGroup.result;
+        }
+    } else {
+        return null;
+    }
+};
+
+
+/**
+ * Parses the arguments of a function or environment
+ *
+ * @param {string} func  "\name" or "\begin{name}"
+ * @param {{numArgs:number,numOptionalArgs:number|undefined}} funcData
+ * @param {Array} args  list of arguments to which new ones will be pushed
+ * @return the position after all arguments have been parsed
+ */
+Parser.prototype.parseArguments = function(pos, mode, func, funcData, args) {
+    var totalArgs = funcData.numArgs + funcData.numOptionalArgs;
+    if (totalArgs === 0) {
+        return pos;
+    }
+
+    var newPos = pos;
+    var baseGreediness = funcData.greediness;
+    var positions = [newPos];
+
+    for (var i = 0; i < totalArgs; i++) {
+        var argType = funcData.argTypes && funcData.argTypes[i];
+        var arg;
+        if (i < funcData.numOptionalArgs) {
+            if (argType) {
+                arg = this.parseSpecialGroup(newPos, argType, mode, true);
+            } else {
+                arg = this.parseOptionalGroup(newPos, mode);
+            }
+            if (!arg) {
+                args.push(null);
+                positions.push(newPos);
+                continue;
+            }
+        } else {
+            if (argType) {
+                arg = this.parseSpecialGroup(newPos, argType, mode);
+            } else {
+                arg = this.parseGroup(newPos, mode);
+            }
+            if (!arg) {
+                var lex = this.lexer.lex(newPos, mode);
+
+                if (!this.settings.throwOnError && lex.text[0] === "\\") {
+                    arg = new ParseFuncOrArgument(
+                        new ParseResult(
+                            this.handleUnsupportedCmd(lex.text, mode),
+                            lex.position),
+                        false);
+                } else {
+                    throw new ParseError(
+                        "Expected group after '" + func + "'", this.lexer, pos);
+                }
+            }
+        }
+        var argNode;
+        if (arg.isFunction) {
+            var argGreediness =
+                functions.funcs[arg.result.result].greediness;
+            if (argGreediness > baseGreediness) {
+                argNode = this.parseFunction(newPos, mode);
+            } else {
+                throw new ParseError(
+                    "Got function '" + arg.result.result + "' as " +
+                    "argument to '" + func + "'",
+                    this.lexer, arg.result.position - 1);
+            }
+        } else {
+            argNode = arg.result;
+        }
+        args.push(argNode.result);
+        positions.push(argNode.position);
+        newPos = argNode.position;
+    }
+
+    args.push(positions);
+
+    return newPos;
+};
+
+
+/**
+ * Parses a group when the mode is changing. Takes a position, a new mode, and
+ * an outer mode that is used to parse the outside.
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseSpecialGroup = function(pos, mode, outerMode, optional) {
+    // Handle `original` argTypes
+    if (mode === "original") {
+        mode = outerMode;
+    }
+
+    if (mode === "color" || mode === "size") {
+        // color and size modes are special because they should have braces and
+        // should only lex a single symbol inside
+        var openBrace = this.lexer.lex(pos, outerMode);
+        if (optional && openBrace.text !== "[") {
+            // optional arguments should return null if they don't exist
+            return null;
+        }
+        this.expect(openBrace, optional ? "[" : "{");
+        var inner = this.lexer.lex(openBrace.position, mode);
+        var data;
+        if (mode === "color") {
+            data = inner.text;
+        } else {
+            data = inner.data;
+        }
+        var closeBrace = this.lexer.lex(inner.position, outerMode);
+        this.expect(closeBrace, optional ? "]" : "}");
+        return new ParseFuncOrArgument(
+            new ParseResult(
+                new ParseNode(mode, data, outerMode),
+                closeBrace.position),
+            false);
+    } else if (mode === "text") {
+        // text mode is special because it should ignore the whitespace before
+        // it
+        var whitespace = this.lexer.lex(pos, "whitespace");
+        pos = whitespace.position;
+    }
+
+    if (optional) {
+        return this.parseOptionalGroup(pos, mode);
+    } else {
+        return this.parseGroup(pos, mode);
+    }
+};
+
+/**
+ * Parses a group, which is either a single nucleus (like "x") or an expression
+ * in braces (like "{x+y}")
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseGroup = function(pos, mode) {
+    var start = this.lexer.lex(pos, mode);
+    // Try to parse an open brace
+    if (start.text === "{") {
+        // If we get a brace, parse an expression
+        var expression = this.parseExpression(start.position, mode, false);
+        // Make sure we get a close brace
+        var closeBrace = this.lexer.lex(expression.position, mode);
+        this.expect(closeBrace, "}");
+        return new ParseFuncOrArgument(
+            new ParseResult(
+                new ParseNode("ordgroup", expression.result, mode),
+                closeBrace.position),
+            false);
+    } else {
+        // Otherwise, just return a nucleus
+        return this.parseSymbol(pos, mode);
+    }
+};
+
+/**
+ * Parses a group, which is an expression in brackets (like "[x+y]")
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseOptionalGroup = function(pos, mode) {
+    var start = this.lexer.lex(pos, mode);
+    // Try to parse an open bracket
+    if (start.text === "[") {
+        // If we get a brace, parse an expression
+        var expression = this.parseExpression(start.position, mode, false, "]");
+        // Make sure we get a close bracket
+        var closeBracket = this.lexer.lex(expression.position, mode);
+        this.expect(closeBracket, "]");
+        return new ParseFuncOrArgument(
+            new ParseResult(
+                new ParseNode("ordgroup", expression.result, mode),
+                closeBracket.position),
+            false);
+    } else {
+        // Otherwise, return null,
+        return null;
+    }
+};
+
+/**
+ * Parse a single symbol out of the string. Here, we handle both the functions
+ * we have defined, as well as the single character symbols
+ *
+ * @return {?ParseFuncOrArgument}
+ */
+Parser.prototype.parseSymbol = function(pos, mode) {
+    var nucleus = this.lexer.lex(pos, mode);
+
+    if (functions.funcs[nucleus.text]) {
+        // If there exists a function with this name, we return the function and
+        // say that it is a function.
+        return new ParseFuncOrArgument(
+            new ParseResult(nucleus.text, nucleus.position),
+            true);
+    } else if (symbols[mode][nucleus.text]) {
+        // Otherwise if this is a no-argument function, find the type it
+        // corresponds to in the symbols map
+        return new ParseFuncOrArgument(
+            new ParseResult(
+                new ParseNode(symbols[mode][nucleus.text].group,
+                              nucleus.text, mode),
+                nucleus.position),
+            false);
+    } else {
+        return null;
+    }
+};
+
+Parser.prototype.ParseNode = ParseNode;
+
+module.exports = Parser;
+
+},{"./Lexer":5,"./ParseError":7,"./environments":17,"./functions":20,"./parseData":22,"./symbols":24,"./utils":25}],9:[function(require,module,exports){
+/**
+ * This is a module for storing settings passed into KaTeX. It correctly handles
+ * default settings.
+ */
+
+/**
+ * Helper function for getting a default value if the value is undefined
+ */
+function get(option, defaultValue) {
+    return option === undefined ? defaultValue : option;
+}
+
+/**
+ * The main Settings object
+ *
+ * The current options stored are:
+ *  - displayMode: Whether the expression should be typeset by default in
+ *                 textstyle or displaystyle (default false)
+ */
+function Settings(options) {
+    // allow null options
+    options = options || {};
+    this.displayMode = get(options.displayMode, false);
+    this.throwOnError = get(options.throwOnError, true);
+    this.errorColor = get(options.errorColor, "#cc0000");
+}
+
+module.exports = Settings;
+
+},{}],10:[function(require,module,exports){
+/**
+ * This file contains information and classes for the various kinds of styles
+ * used in TeX. It provides a generic `Style` class, which holds information
+ * about a specific style. It then provides instances of all the different kinds
+ * of styles possible, and provides functions to move between them and get
+ * information about them.
+ */
+
+/**
+ * The main style class. Contains a unique id for the style, a size (which is
+ * the same for cramped and uncramped version of a style), a cramped flag, and a
+ * size multiplier, which gives the size difference between a style and
+ * textstyle.
+ */
+function Style(id, size, multiplier, cramped) {
+    this.id = id;
+    this.size = size;
+    this.cramped = cramped;
+    this.sizeMultiplier = multiplier;
+}
+
+/**
+ * Get the style of a superscript given a base in the current style.
+ */
+Style.prototype.sup = function() {
+    return styles[sup[this.id]];
+};
+
+/**
+ * Get the style of a subscript given a base in the current style.
+ */
+Style.prototype.sub = function() {
+    return styles[sub[this.id]];
+};
+
+/**
+ * Get the style of a fraction numerator given the fraction in the current
+ * style.
+ */
+Style.prototype.fracNum = function() {
+    return styles[fracNum[this.id]];
+};
+
+/**
+ * Get the style of a fraction denominator given the fraction in the current
+ * style.
+ */
+Style.prototype.fracDen = function() {
+    return styles[fracDen[this.id]];
+};
+
+/**
+ * Get the cramped version of a style (in particular, cramping a cramped style
+ * doesn't change the style).
+ */
+Style.prototype.cramp = function() {
+    return styles[cramp[this.id]];
+};
+
+/**
+ * HTML class name, like "displaystyle cramped"
+ */
+Style.prototype.cls = function() {
+    return sizeNames[this.size] + (this.cramped ? " cramped" : " uncramped");
+};
+
+/**
+ * HTML Reset class name, like "reset-textstyle"
+ */
+Style.prototype.reset = function() {
+    return resetNames[this.size];
+};
+
+// IDs of the different styles
+var D = 0;
+var Dc = 1;
+var T = 2;
+var Tc = 3;
+var S = 4;
+var Sc = 5;
+var SS = 6;
+var SSc = 7;
+
+// String names for the different sizes
+var sizeNames = [
+    "displaystyle textstyle",
+    "textstyle",
+    "scriptstyle",
+    "scriptscriptstyle"
+];
+
+// Reset names for the different sizes
+var resetNames = [
+    "reset-textstyle",
+    "reset-textstyle",
+    "reset-scriptstyle",
+    "reset-scriptscriptstyle"
+];
+
+// Instances of the different styles
+var styles = [
+    new Style(D, 0, 1.0, false),
+    new Style(Dc, 0, 1.0, true),
+    new Style(T, 1, 1.0, false),
+    new Style(Tc, 1, 1.0, true),
+    new Style(S, 2, 0.7, false),
+    new Style(Sc, 2, 0.7, true),
+    new Style(SS, 3, 0.5, false),
+    new Style(SSc, 3, 0.5, true)
+];
+
+// Lookup tables for switching from one style to another
+var sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];
+var sub = [Sc, Sc, Sc, Sc, SSc, SSc, SSc, SSc];
+var fracNum = [T, Tc, S, Sc, SS, SSc, SS, SSc];
+var fracDen = [Tc, Tc, Sc, Sc, SSc, SSc, SSc, SSc];
+var cramp = [Dc, Dc, Tc, Tc, Sc, Sc, SSc, SSc];
+
+// We only export some of the styles. Also, we don't export the `Style` class so
+// no more styles can be generated.
+module.exports = {
+    DISPLAY: styles[D],
+    TEXT: styles[T],
+    SCRIPT: styles[S],
+    SCRIPTSCRIPT: styles[SS]
+};
+
+},{}],11:[function(require,module,exports){
+/**
+ * This module contains general functions that can be used for building
+ * different kinds of domTree nodes in a consistent manner.
+ */
+
+var domTree = require("./domTree");
+var fontMetrics = require("./fontMetrics");
+var symbols = require("./symbols");
+var utils = require("./utils");
+
+var greekCapitals = [
+    "\\Gamma",
+    "\\Delta",
+    "\\Theta",
+    "\\Lambda",
+    "\\Xi",
+    "\\Pi",
+    "\\Sigma",
+    "\\Upsilon",
+    "\\Phi",
+    "\\Psi",
+    "\\Omega"
+];
+
+var dotlessLetters = [
+    "\u0131",   // dotless i, \imath
+    "\u0237"    // dotless j, \jmath
+];
+
+/**
+ * Makes a symbolNode after translation via the list of symbols in symbols.js.
+ * Correctly pulls out metrics for the character, and optionally takes a list of
+ * classes to be attached to the node.
+ */
+var makeSymbol = function(value, style, mode, color, classes) {
+    // Replace the value with its replaced value from symbol.js
+    if (symbols[mode][value] && symbols[mode][value].replace) {
+        value = symbols[mode][value].replace;
+    }
+
+    var metrics = fontMetrics.getCharacterMetrics(value, style);
+
+    var symbolNode;
+    if (metrics) {
+        symbolNode = new domTree.symbolNode(
+            value, metrics.height, metrics.depth, metrics.italic, metrics.skew,
+            classes);
+    } else {
+        // TODO(emily): Figure out a good way to only print this in development
+        typeof console !== "undefined" && console.warn(
+            "No character metrics for '" + value + "' in style '" +
+                style + "'");
+        symbolNode = new domTree.symbolNode(value, 0, 0, 0, 0, classes);
+    }
+
+    if (color) {
+        symbolNode.style.color = color;
+    }
+
+    return symbolNode;
+};
+
+/**
+ * Makes a symbol in Main-Regular or AMS-Regular.
+ * Used for rel, bin, open, close, inner, and punct.
+ */
+var mathsym = function(value, mode, color, classes) {
+    // Decide what font to render the symbol in by its entry in the symbols
+    // table.
+    // Have a special case for when the value = \ because the \ is used as a
+    // textord in unsupported command errors but cannot be parsed as a regular
+    // text ordinal and is therefore not present as a symbol in the symbols
+    // table for text
+    if (value === "\\" || symbols[mode][value].font === "main") {
+        return makeSymbol(value, "Main-Regular", mode, color, classes);
+    } else {
+        return makeSymbol(
+            value, "AMS-Regular", mode, color, classes.concat(["amsrm"]));
+    }
+};
+
+/**
+ * Makes a symbol in the default font for mathords and textords.
+ */
+var mathDefault = function(value, mode, color, classes, type) {
+    if (type === "mathord") {
+        return mathit(value, mode, color, classes);
+    } else if (type === "textord") {
+        return makeSymbol(
+            value, "Main-Regular", mode, color, classes.concat(["mathrm"]));
+    } else {
+        throw new Error("unexpected type: " + type + " in mathDefault");
+    }
+};
+
+/**
+ * Makes a symbol in the italic math font.
+ */
+var mathit = function(value, mode, color, classes) {
+    if (/[0-9]/.test(value.charAt(0)) ||
+            // glyphs for \imath and \jmath do not exist in Math-Italic so we
+            // need to use Main-Italic instead
+            utils.contains(dotlessLetters, value) ||
+            utils.contains(greekCapitals, value)) {
+        return makeSymbol(
+            value, "Main-Italic", mode, color, classes.concat(["mainit"]));
+    } else {
+        return makeSymbol(
+            value, "Math-Italic", mode, color, classes.concat(["mathit"]));
+    }
+};
+
+/**
+ * Makes either a mathord or textord in the correct font and color.
+ */
+var makeOrd = function(group, options, type) {
+    var mode = group.mode;
+    var value = group.value;
+    if (symbols[mode][value] && symbols[mode][value].replace) {
+        value = symbols[mode][value].replace;
+    }
+
+    var classes = ["mord"];
+    var color = options.getColor();
+
+    var font = options.font;
+    if (font) {
+        if (font === "mathit" || utils.contains(dotlessLetters, value)) {
+            return mathit(value, mode, color, classes);
+        } else {
+            var fontName = fontMap[font].fontName;
+            if (fontMetrics.getCharacterMetrics(value, fontName)) {
+                return makeSymbol(value, fontName, mode, color, classes.concat([font]));
+            } else {
+                return mathDefault(value, mode, color, classes, type);
+            }
+        }
+    } else {
+        return mathDefault(value, mode, color, classes, type);
+    }
+};
+
+/**
+ * Calculate the height, depth, and maxFontSize of an element based on its
+ * children.
+ */
+var sizeElementFromChildren = function(elem) {
+    var height = 0;
+    var depth = 0;
+    var maxFontSize = 0;
+
+    if (elem.children) {
+        for (var i = 0; i < elem.children.length; i++) {
+            if (elem.children[i].height > height) {
+                height = elem.children[i].height;
+            }
+            if (elem.children[i].depth > depth) {
+                depth = elem.children[i].depth;
+            }
+            if (elem.children[i].maxFontSize > maxFontSize) {
+                maxFontSize = elem.children[i].maxFontSize;
+            }
+        }
+    }
+
+    elem.height = height;
+    elem.depth = depth;
+    elem.maxFontSize = maxFontSize;
+};
+
+/**
+ * Makes a span with the given list of classes, list of children, and color.
+ */
+var makeSpan = function(classes, children, color) {
+    var span = new domTree.span(classes, children);
+
+    sizeElementFromChildren(span);
+
+    if (color) {
+        span.style.color = color;
+    }
+
+    return span;
+};
+
+/**
+ * Makes a document fragment with the given list of children.
+ */
+var makeFragment = function(children) {
+    var fragment = new domTree.documentFragment(children);
+
+    sizeElementFromChildren(fragment);
+
+    return fragment;
+};
+
+/**
+ * Makes an element placed in each of the vlist elements to ensure that each
+ * element has the same max font size. To do this, we create a zero-width space
+ * with the correct font size.
+ */
+var makeFontSizer = function(options, fontSize) {
+    var fontSizeInner = makeSpan([], [new domTree.symbolNode("\u200b")]);
+    fontSizeInner.style.fontSize = (fontSize / options.style.sizeMultiplier) + "em";
+
+    var fontSizer = makeSpan(
+        ["fontsize-ensurer", "reset-" + options.size, "size5"],
+        [fontSizeInner]);
+
+    return fontSizer;
+};
+
+/**
+ * Makes a vertical list by stacking elements and kerns on top of each other.
+ * Allows for many different ways of specifying the positioning method.
+ *
+ * Arguments:
+ *  - children: A list of child or kern nodes to be stacked on top of each other
+ *              (i.e. the first element will be at the bottom, and the last at
+ *              the top). Element nodes are specified as
+ *                {type: "elem", elem: node}
+ *              while kern nodes are specified as
+ *                {type: "kern", size: size}
+ *  - positionType: The method by which the vlist should be positioned. Valid
+ *                  values are:
+ *                   - "individualShift": The children list only contains elem
+ *                                        nodes, and each node contains an extra
+ *                                        "shift" value of how much it should be
+ *                                        shifted (note that shifting is always
+ *                                        moving downwards). positionData is
+ *                                        ignored.
+ *                   - "top": The positionData specifies the topmost point of
+ *                            the vlist (note this is expected to be a height,
+ *                            so positive values move up)
+ *                   - "bottom": The positionData specifies the bottommost point
+ *                               of the vlist (note this is expected to be a
+ *                               depth, so positive values move down
+ *                   - "shift": The vlist will be positioned such that its
+ *                              baseline is positionData away from the baseline
+ *                              of the first child. Positive values move
+ *                              downwards.
+ *                   - "firstBaseline": The vlist will be positioned such that
+ *                                      its baseline is aligned with the
+ *                                      baseline of the first child.
+ *                                      positionData is ignored. (this is
+ *                                      equivalent to "shift" with
+ *                                      positionData=0)
+ *  - positionData: Data used in different ways depending on positionType
+ *  - options: An Options object
+ *
+ */
+var makeVList = function(children, positionType, positionData, options) {
+    var depth;
+    var currPos;
+    var i;
+    if (positionType === "individualShift") {
+        var oldChildren = children;
+        children = [oldChildren[0]];
+
+        // Add in kerns to the list of children to get each element to be
+        // shifted to the correct specified shift
+        depth = -oldChildren[0].shift - oldChildren[0].elem.depth;
+        currPos = depth;
+        for (i = 1; i < oldChildren.length; i++) {
+            var diff = -oldChildren[i].shift - currPos -
+                oldChildren[i].elem.depth;
+            var size = diff -
+                (oldChildren[i - 1].elem.height +
+                 oldChildren[i - 1].elem.depth);
+
+            currPos = currPos + diff;
+
+            children.push({type: "kern", size: size});
+            children.push(oldChildren[i]);
+        }
+    } else if (positionType === "top") {
+        // We always start at the bottom, so calculate the bottom by adding up
+        // all the sizes
+        var bottom = positionData;
+        for (i = 0; i < children.length; i++) {
+            if (children[i].type === "kern") {
+                bottom -= children[i].size;
+            } else {
+                bottom -= children[i].elem.height + children[i].elem.depth;
+            }
+        }
+        depth = bottom;
+    } else if (positionType === "bottom") {
+        depth = -positionData;
+    } else if (positionType === "shift") {
+        depth = -children[0].elem.depth - positionData;
+    } else if (positionType === "firstBaseline") {
+        depth = -children[0].elem.depth;
+    } else {
+        depth = 0;
+    }
+
+    // Make the fontSizer
+    var maxFontSize = 0;
+    for (i = 0; i < children.length; i++) {
+        if (children[i].type === "elem") {
+            maxFontSize = Math.max(maxFontSize, children[i].elem.maxFontSize);
+        }
+    }
+    var fontSizer = makeFontSizer(options, maxFontSize);
+
+    // Create a new list of actual children at the correct offsets
+    var realChildren = [];
+    currPos = depth;
+    for (i = 0; i < children.length; i++) {
+        if (children[i].type === "kern") {
+            currPos += children[i].size;
+        } else {
+            var child = children[i].elem;
+
+            var shift = -child.depth - currPos;
+            currPos += child.height + child.depth;
+
+            var childWrap = makeSpan([], [fontSizer, child]);
+            childWrap.height -= shift;
+            childWrap.depth += shift;
+            childWrap.style.top = shift + "em";
+
+            realChildren.push(childWrap);
+        }
+    }
+
+    // Add in an element at the end with no offset to fix the calculation of
+    // baselines in some browsers (namely IE, sometimes safari)
+    var baselineFix = makeSpan(
+        ["baseline-fix"], [fontSizer, new domTree.symbolNode("\u200b")]);
+    realChildren.push(baselineFix);
+
+    var vlist = makeSpan(["vlist"], realChildren);
+    // Fix the final height and depth, in case there were kerns at the ends
+    // since the makeSpan calculation won't take that in to account.
+    vlist.height = Math.max(currPos, vlist.height);
+    vlist.depth = Math.max(-depth, vlist.depth);
+    return vlist;
+};
+
+// A table of size -> font size for the different sizing functions
+var sizingMultiplier = {
+    size1: 0.5,
+    size2: 0.7,
+    size3: 0.8,
+    size4: 0.9,
+    size5: 1.0,
+    size6: 1.2,
+    size7: 1.44,
+    size8: 1.73,
+    size9: 2.07,
+    size10: 2.49
+};
+
+// A map of spacing functions to their attributes, like size and corresponding
+// CSS class
+var spacingFunctions = {
+    "\\qquad": {
+        size: "2em",
+        className: "qquad"
+    },
+    "\\quad": {
+        size: "1em",
+        className: "quad"
+    },
+    "\\enspace": {
+        size: "0.5em",
+        className: "enspace"
+    },
+    "\\;": {
+        size: "0.277778em",
+        className: "thickspace"
+    },
+    "\\:": {
+        size: "0.22222em",
+        className: "mediumspace"
+    },
+    "\\,": {
+        size: "0.16667em",
+        className: "thinspace"
+    },
+    "\\!": {
+        size: "-0.16667em",
+        className: "negativethinspace"
+    }
+};
+
+/**
+ * Maps TeX font commands to objects containing:
+ * - variant: string used for "mathvariant" attribute in buildMathML.js
+ * - fontName: the "style" parameter to fontMetrics.getCharacterMetrics
+ */
+// A map between tex font commands an MathML mathvariant attribute values
+var fontMap = {
+    // styles
+    "mathbf": {
+        variant: "bold",
+        fontName: "Main-Bold"
+    },
+    "mathrm": {
+        variant: "normal",
+        fontName: "Main-Regular"
+    },
+
+    // "mathit" is missing because it requires the use of two fonts: Main-Italic
+    // and Math-Italic.  This is handled by a special case in makeOrd which ends
+    // up calling mathit.
+
+    // families
+    "mathbb": {
+        variant: "double-struck",
+        fontName: "AMS-Regular"
+    },
+    "mathcal": {
+        variant: "script",
+        fontName: "Caligraphic-Regular"
+    },
+    "mathfrak": {
+        variant: "fraktur",
+        fontName: "Fraktur-Regular"
+    },
+    "mathscr": {
+        variant: "script",
+        fontName: "Script-Regular"
+    },
+    "mathsf": {
+        variant: "sans-serif",
+        fontName: "SansSerif-Regular"
+    },
+    "mathtt": {
+        variant: "monospace",
+        fontName: "Typewriter-Regular"
+    }
+};
+
+module.exports = {
+    fontMap: fontMap,
+    makeSymbol: makeSymbol,
+    mathsym: mathsym,
+    makeSpan: makeSpan,
+    makeFragment: makeFragment,
+    makeVList: makeVList,
+    makeOrd: makeOrd,
+    sizingMultiplier: sizingMultiplier,
+    spacingFunctions: spacingFunctions
+};
+
+},{"./domTree":16,"./fontMetrics":18,"./symbols":24,"./utils":25}],12:[function(require,module,exports){
+/**
+ * This file does the main work of building a domTree structure from a parse
+ * tree. The entry point is the `buildHTML` function, which takes a parse tree.
+ * Then, the buildExpression, buildGroup, and various groupTypes functions are
+ * called, to produce a final HTML tree.
+ */
+
+var ParseError = require("./ParseError");
+var Style = require("./Style");
+
+var buildCommon = require("./buildCommon");
+var delimiter = require("./delimiter");
+var domTree = require("./domTree");
+var fontMetrics = require("./fontMetrics");
+var utils = require("./utils");
+
+var makeSpan = buildCommon.makeSpan;
+
+/**
+ * Take a list of nodes, build them in order, and return a list of the built
+ * nodes. This function handles the `prev` node correctly, and passes the
+ * previous element from the list as the prev of the next element.
+ */
+var buildExpression = function(expression, options, prev) {
+    var groups = [];
+    for (var i = 0; i < expression.length; i++) {
+        var group = expression[i];
+        groups.push(buildGroup(group, options, prev));
+        prev = group;
+    }
+    return groups;
+};
+
+// List of types used by getTypeOfGroup,
+// see https://github.com/Khan/KaTeX/wiki/Examining-TeX#group-types
+var groupToType = {
+    mathord: "mord",
+    textord: "mord",
+    bin: "mbin",
+    rel: "mrel",
+    text: "mord",
+    open: "mopen",
+    close: "mclose",
+    inner: "minner",
+    genfrac: "mord",
+    array: "mord",
+    spacing: "mord",
+    punct: "mpunct",
+    ordgroup: "mord",
+    op: "mop",
+    katex: "mord",
+    overline: "mord",
+    rule: "mord",
+    leftright: "minner",
+    sqrt: "mord",
+    accent: "mord"
+};
+
+/**
+ * Gets the final math type of an expression, given its group type. This type is
+ * used to determine spacing between elements, and affects bin elements by
+ * causing them to change depending on what types are around them. This type
+ * must be attached to the outermost node of an element as a CSS class so that
+ * spacing with its surrounding elements works correctly.
+ *
+ * Some elements can be mapped one-to-one from group type to math type, and
+ * those are listed in the `groupToType` table.
+ *
+ * Others (usually elements that wrap around other elements) often have
+ * recursive definitions, and thus call `getTypeOfGroup` on their inner
+ * elements.
+ */
+var getTypeOfGroup = function(group) {
+    if (group == null) {
+        // Like when typesetting $^3$
+        return groupToType.mathord;
+    } else if (group.type === "supsub") {
+        return getTypeOfGroup(group.value.base);
+    } else if (group.type === "llap" || group.type === "rlap") {
+        return getTypeOfGroup(group.value);
+    } else if (group.type === "color") {
+        return getTypeOfGroup(group.value.value);
+    } else if (group.type === "sizing") {
+        return getTypeOfGroup(group.value.value);
+    } else if (group.type === "styling") {
+        return getTypeOfGroup(group.value.value);
+    } else if (group.type === "delimsizing") {
+        return groupToType[group.value.delimType];
+    } else {
+        return groupToType[group.type];
+    }
+};
+
+/**
+ * Sometimes, groups perform special rules when they have superscripts or
+ * subscripts attached to them. This function lets the `supsub` group know that
+ * its inner element should handle the superscripts and subscripts instead of
+ * handling them itself.
+ */
+var shouldHandleSupSub = function(group, options) {
+    if (!group) {
+        return false;
+    } else if (group.type === "op") {
+        // Operators handle supsubs differently when they have limits
+        // (e.g. `\displaystyle\sum_2^3`)
+        return group.value.limits &&
+            (options.style.size === Style.DISPLAY.size || group.value.alwaysHandleSupSub);
+    } else if (group.type === "accent") {
+        return isCharacterBox(group.value.base);
+    } else {
+        return null;
+    }
+};
+
+/**
+ * Sometimes we want to pull out the innermost element of a group. In most
+ * cases, this will just be the group itself, but when ordgroups and colors have
+ * a single element, we want to pull that out.
+ */
+var getBaseElem = function(group) {
+    if (!group) {
+        return false;
+    } else if (group.type === "ordgroup") {
+        if (group.value.length === 1) {
+            return getBaseElem(group.value[0]);
+        } else {
+            return group;
+        }
+    } else if (group.type === "color") {
+        if (group.value.value.length === 1) {
+            return getBaseElem(group.value.value[0]);
+        } else {
+            return group;
+        }
+    } else {
+        return group;
+    }
+};
+
+/**
+ * TeXbook algorithms often reference "character boxes", which are simply groups
+ * with a single character in them. To decide if something is a character box,
+ * we find its innermost group, and see if it is a single character.
+ */
+var isCharacterBox = function(group) {
+    var baseElem = getBaseElem(group);
+
+    // These are all they types of groups which hold single characters
+    return baseElem.type === "mathord" ||
+        baseElem.type === "textord" ||
+        baseElem.type === "bin" ||
+        baseElem.type === "rel" ||
+        baseElem.type === "inner" ||
+        baseElem.type === "open" ||
+        baseElem.type === "close" ||
+        baseElem.type === "punct";
+};
+
+var makeNullDelimiter = function(options) {
+    return makeSpan([
+        "sizing", "reset-" + options.size, "size5",
+        options.style.reset(), Style.TEXT.cls(),
+        "nulldelimiter"
+    ]);
+};
+
+/**
+ * This is a map of group types to the function used to handle that type.
+ * Simpler types come at the beginning, while complicated types come afterwards.
+ */
+var groupTypes = {
+    mathord: function(group, options, prev) {
+        return buildCommon.makeOrd(group, options, "mathord");
+    },
+
+    textord: function(group, options, prev) {
+        return buildCommon.makeOrd(group, options, "textord");
+    },
+
+    bin: function(group, options, prev) {
+        var className = "mbin";
+        // Pull out the most recent element. Do some special handling to find
+        // things at the end of a \color group. Note that we don't use the same
+        // logic for ordgroups (which count as ords).
+        var prevAtom = prev;
+        while (prevAtom && prevAtom.type === "color") {
+            var atoms = prevAtom.value.value;
+            prevAtom = atoms[atoms.length - 1];
+        }
+        // See TeXbook pg. 442-446, Rules 5 and 6, and the text before Rule 19.
+        // Here, we determine whether the bin should turn into an ord. We
+        // currently only apply Rule 5.
+        if (!prev || utils.contains(["mbin", "mopen", "mrel", "mop", "mpunct"],
+                getTypeOfGroup(prevAtom))) {
+            group.type = "textord";
+            className = "mord";
+        }
+
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), [className]);
+    },
+
+    rel: function(group, options, prev) {
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), ["mrel"]);
+    },
+
+    open: function(group, options, prev) {
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), ["mopen"]);
+    },
+
+    close: function(group, options, prev) {
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), ["mclose"]);
+    },
+
+    inner: function(group, options, prev) {
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), ["minner"]);
+    },
+
+    punct: function(group, options, prev) {
+        return buildCommon.mathsym(
+            group.value, group.mode, options.getColor(), ["mpunct"]);
+    },
+
+    ordgroup: function(group, options, prev) {
+        return makeSpan(
+            ["mord", options.style.cls()],
+            buildExpression(group.value, options.reset())
+        );
+    },
+
+    text: function(group, options, prev) {
+        return makeSpan(["text", "mord", options.style.cls()],
+            buildExpression(group.value.body, options.reset()));
+    },
+
+    color: function(group, options, prev) {
+        var elements = buildExpression(
+            group.value.value,
+            options.withColor(group.value.color),
+            prev
+        );
+
+        // \color isn't supposed to affect the type of the elements it contains.
+        // To accomplish this, we wrap the results in a fragment, so the inner
+        // elements will be able to directly interact with their neighbors. For
+        // example, `\color{red}{2 +} 3` has the same spacing as `2 + 3`
+        return new buildCommon.makeFragment(elements);
+    },
+
+    supsub: function(group, options, prev) {
+        // Superscript and subscripts are handled in the TeXbook on page
+        // 445-446, rules 18(a-f).
+
+        // Here is where we defer to the inner group if it should handle
+        // superscripts and subscripts itself.
+        if (shouldHandleSupSub(group.value.base, options)) {
+            return groupTypes[group.value.base.type](group, options, prev);
+        }
+
+        var base = buildGroup(group.value.base, options.reset());
+        var supmid, submid, sup, sub;
+
+        if (group.value.sup) {
+            sup = buildGroup(group.value.sup,
+                    options.withStyle(options.style.sup()));
+            supmid = makeSpan(
+                    [options.style.reset(), options.style.sup().cls()], [sup]);
+        }
+
+        if (group.value.sub) {
+            sub = buildGroup(group.value.sub,
+                    options.withStyle(options.style.sub()));
+            submid = makeSpan(
+                    [options.style.reset(), options.style.sub().cls()], [sub]);
+        }
+
+        // Rule 18a
+        var supShift, subShift;
+        if (isCharacterBox(group.value.base)) {
+            supShift = 0;
+            subShift = 0;
+        } else {
+            supShift = base.height - fontMetrics.metrics.supDrop;
+            subShift = base.depth + fontMetrics.metrics.subDrop;
+        }
+
+        // Rule 18c
+        var minSupShift;
+        if (options.style === Style.DISPLAY) {
+            minSupShift = fontMetrics.metrics.sup1;
+        } else if (options.style.cramped) {
+            minSupShift = fontMetrics.metrics.sup3;
+        } else {
+            minSupShift = fontMetrics.metrics.sup2;
+        }
+
+        // scriptspace is a font-size-independent size, so scale it
+        // appropriately
+        var multiplier = Style.TEXT.sizeMultiplier *
+                options.style.sizeMultiplier;
+        var scriptspace =
+            (0.5 / fontMetrics.metrics.ptPerEm) / multiplier + "em";
+
+        var supsub;
+        if (!group.value.sup) {
+            // Rule 18b
+            subShift = Math.max(
+                subShift, fontMetrics.metrics.sub1,
+                sub.height - 0.8 * fontMetrics.metrics.xHeight);
+
+            supsub = buildCommon.makeVList([
+                {type: "elem", elem: submid}
+            ], "shift", subShift, options);
+
+            supsub.children[0].style.marginRight = scriptspace;
+
+            // Subscripts shouldn't be shifted by the base's italic correction.
+            // Account for that by shifting the subscript back the appropriate
+            // amount. Note we only do this when the base is a single symbol.
+            if (base instanceof domTree.symbolNode) {
+                supsub.children[0].style.marginLeft = -base.italic + "em";
+            }
+        } else if (!group.value.sub) {
+            // Rule 18c, d
+            supShift = Math.max(supShift, minSupShift,
+                sup.depth + 0.25 * fontMetrics.metrics.xHeight);
+
+            supsub = buildCommon.makeVList([
+                {type: "elem", elem: supmid}
+            ], "shift", -supShift, options);
+
+            supsub.children[0].style.marginRight = scriptspace;
+        } else {
+            supShift = Math.max(
+                supShift, minSupShift,
+                sup.depth + 0.25 * fontMetrics.metrics.xHeight);
+            subShift = Math.max(subShift, fontMetrics.metrics.sub2);
+
+            var ruleWidth = fontMetrics.metrics.defaultRuleThickness;
+
+            // Rule 18e
+            if ((supShift - sup.depth) - (sub.height - subShift) <
+                    4 * ruleWidth) {
+                subShift = 4 * ruleWidth - (supShift - sup.depth) + sub.height;
+                var psi = 0.8 * fontMetrics.metrics.xHeight -
+                    (supShift - sup.depth);
+                if (psi > 0) {
+                    supShift += psi;
+                    subShift -= psi;
+                }
+            }
+
+            supsub = buildCommon.makeVList([
+                {type: "elem", elem: submid, shift: subShift},
+                {type: "elem", elem: supmid, shift: -supShift}
+            ], "individualShift", null, options);
+
+            // See comment above about subscripts not being shifted
+            if (base instanceof domTree.symbolNode) {
+                supsub.children[0].style.marginLeft = -base.italic + "em";
+            }
+
+            supsub.children[0].style.marginRight = scriptspace;
+            supsub.children[1].style.marginRight = scriptspace;
+        }
+
+        return makeSpan([getTypeOfGroup(group.value.base)],
+            [base, supsub]);
+    },
+
+    genfrac: function(group, options, prev) {
+        // Fractions are handled in the TeXbook on pages 444-445, rules 15(a-e).
+        // Figure out what style this fraction should be in based on the
+        // function used
+        var fstyle = options.style;
+        if (group.value.size === "display") {
+            fstyle = Style.DISPLAY;
+        } else if (group.value.size === "text") {
+            fstyle = Style.TEXT;
+        }
+
+        var nstyle = fstyle.fracNum();
+        var dstyle = fstyle.fracDen();
+
+        var numer = buildGroup(group.value.numer, options.withStyle(nstyle));
+        var numerreset = makeSpan([fstyle.reset(), nstyle.cls()], [numer]);
+
+        var denom = buildGroup(group.value.denom, options.withStyle(dstyle));
+        var denomreset = makeSpan([fstyle.reset(), dstyle.cls()], [denom]);
+
+        var ruleWidth;
+        if (group.value.hasBarLine) {
+            ruleWidth = fontMetrics.metrics.defaultRuleThickness /
+                options.style.sizeMultiplier;
+        } else {
+            ruleWidth = 0;
+        }
+
+        // Rule 15b
+        var numShift;
+        var clearance;
+        var denomShift;
+        if (fstyle.size === Style.DISPLAY.size) {
+            numShift = fontMetrics.metrics.num1;
+            if (ruleWidth > 0) {
+                clearance = 3 * ruleWidth;
+            } else {
+                clearance = 7 * fontMetrics.metrics.defaultRuleThickness;
+            }
+            denomShift = fontMetrics.metrics.denom1;
+        } else {
+            if (ruleWidth > 0) {
+                numShift = fontMetrics.metrics.num2;
+                clearance = ruleWidth;
+            } else {
+                numShift = fontMetrics.metrics.num3;
+                clearance = 3 * fontMetrics.metrics.defaultRuleThickness;
+            }
+            denomShift = fontMetrics.metrics.denom2;
+        }
+
+        var frac;
+        if (ruleWidth === 0) {
+            // Rule 15c
+            var candiateClearance =
+                (numShift - numer.depth) - (denom.height - denomShift);
+            if (candiateClearance < clearance) {
+                numShift += 0.5 * (clearance - candiateClearance);
+                denomShift += 0.5 * (clearance - candiateClearance);
+            }
+
+            frac = buildCommon.makeVList([
+                {type: "elem", elem: denomreset, shift: denomShift},
+                {type: "elem", elem: numerreset, shift: -numShift}
+            ], "individualShift", null, options);
+        } else {
+            // Rule 15d
+            var axisHeight = fontMetrics.metrics.axisHeight;
+
+            if ((numShift - numer.depth) - (axisHeight + 0.5 * ruleWidth) <
+                    clearance) {
+                numShift +=
+                    clearance - ((numShift - numer.depth) -
+                                 (axisHeight + 0.5 * ruleWidth));
+            }
+
+            if ((axisHeight - 0.5 * ruleWidth) - (denom.height - denomShift) <
+                    clearance) {
+                denomShift +=
+                    clearance - ((axisHeight - 0.5 * ruleWidth) -
+                                 (denom.height - denomShift));
+            }
+
+            var mid = makeSpan(
+                [options.style.reset(), Style.TEXT.cls(), "frac-line"]);
+            // Manually set the height of the line because its height is
+            // created in CSS
+            mid.height = ruleWidth;
+
+            var midShift = -(axisHeight - 0.5 * ruleWidth);
+
+            frac = buildCommon.makeVList([
+                {type: "elem", elem: denomreset, shift: denomShift},
+                {type: "elem", elem: mid,        shift: midShift},
+                {type: "elem", elem: numerreset, shift: -numShift}
+            ], "individualShift", null, options);
+        }
+
+        // Since we manually change the style sometimes (with \dfrac or \tfrac),
+        // account for the possible size change here.
+        frac.height *= fstyle.sizeMultiplier / options.style.sizeMultiplier;
+        frac.depth *= fstyle.sizeMultiplier / options.style.sizeMultiplier;
+
+        // Rule 15e
+        var delimSize;
+        if (fstyle.size === Style.DISPLAY.size) {
+            delimSize = fontMetrics.metrics.delim1;
+        } else {
+            delimSize = fontMetrics.metrics.getDelim2(fstyle);
+        }
+
+        var leftDelim, rightDelim;
+        if (group.value.leftDelim == null) {
+            leftDelim = makeNullDelimiter(options);
+        } else {
+            leftDelim = delimiter.customSizedDelim(
+                group.value.leftDelim, delimSize, true,
+                options.withStyle(fstyle), group.mode);
+        }
+        if (group.value.rightDelim == null) {
+            rightDelim = makeNullDelimiter(options);
+        } else {
+            rightDelim = delimiter.customSizedDelim(
+                group.value.rightDelim, delimSize, true,
+                options.withStyle(fstyle), group.mode);
+        }
+
+        return makeSpan(
+            ["mord", options.style.reset(), fstyle.cls()],
+            [leftDelim, makeSpan(["mfrac"], [frac]), rightDelim],
+            options.getColor());
+    },
+
+    array: function(group, options, prev) {
+        var r, c;
+        var nr = group.value.body.length;
+        var nc = 0;
+        var body = new Array(nr);
+
+        // Horizontal spacing
+        var pt = 1 / fontMetrics.metrics.ptPerEm;
+        var arraycolsep = 5 * pt; // \arraycolsep in article.cls
+
+        // Vertical spacing
+        var baselineskip = 12 * pt; // see size10.clo
+        // Default \arraystretch from lttab.dtx
+        // TODO(gagern): may get redefined once we have user-defined macros
+        var arraystretch = utils.deflt(group.value.arraystretch, 1);
+        var arrayskip = arraystretch * baselineskip;
+        var arstrutHeight = 0.7 * arrayskip; // \strutbox in ltfsstrc.dtx and
+        var arstrutDepth = 0.3 * arrayskip;  // \@arstrutbox in lttab.dtx
+
+        var totalHeight = 0;
+        for (r = 0; r < group.value.body.length; ++r) {
+            var inrow = group.value.body[r];
+            var height = arstrutHeight; // \@array adds an \@arstrut
+            var depth = arstrutDepth;   // to each tow (via the template)
+
+            if (nc < inrow.length) {
+                nc = inrow.length;
+            }
+
+            var outrow = new Array(inrow.length);
+            for (c = 0; c < inrow.length; ++c) {
+                var elt = buildGroup(inrow[c], options);
+                if (depth < elt.depth) {
+                    depth = elt.depth;
+                }
+                if (height < elt.height) {
+                    height = elt.height;
+                }
+                outrow[c] = elt;
+            }
+
+            var gap = 0;
+            if (group.value.rowGaps[r]) {
+                gap = group.value.rowGaps[r].value;
+                switch (gap.unit) {
+                case "em":
+                    gap = gap.number;
+                    break;
+                case "ex":
+                    gap = gap.number * fontMetrics.metrics.emPerEx;
+                    break;
+                default:
+                    console.error("Can't handle unit " + gap.unit);
+                    gap = 0;
+                }
+                if (gap > 0) { // \@argarraycr
+                    gap += arstrutDepth;
+                    if (depth < gap) {
+                        depth = gap; // \@xargarraycr
+                    }
+                    gap = 0;
+                }
+            }
+
+            outrow.height = height;
+            outrow.depth = depth;
+            totalHeight += height;
+            outrow.pos = totalHeight;
+            totalHeight += depth + gap; // \@yargarraycr
+            body[r] = outrow;
+        }
+
+        var offset = totalHeight / 2 + fontMetrics.metrics.axisHeight;
+        var colDescriptions = group.value.cols || [];
+        var cols = [];
+        var colSep;
+        var colDescrNum;
+        for (c = 0, colDescrNum = 0;
+             // Continue while either there are more columns or more column
+             // descriptions, so trailing separators don't get lost.
+             c < nc || colDescrNum < colDescriptions.length;
+             ++c, ++colDescrNum) {
+
+            var colDescr = colDescriptions[colDescrNum] || {};
+
+            var firstSeparator = true;
+            while (colDescr.type === "separator") {
+                // If there is more than one separator in a row, add a space
+                // between them.
+                if (!firstSeparator) {
+                    colSep = makeSpan(["arraycolsep"], []);
+                    colSep.style.width =
+                        fontMetrics.metrics.doubleRuleSep + "em";
+                    cols.push(colSep);
+                }
+
+                if (colDescr.separator === "|") {
+                    var separator = makeSpan(
+                        ["vertical-separator"],
+                        []);
+                    separator.style.height = totalHeight + "em";
+                    separator.style.verticalAlign =
+                        -(totalHeight - offset) + "em";
+
+                    cols.push(separator);
+                } else {
+                    throw new ParseError(
+                        "Invalid separator type: " + colDescr.separator);
+                }
+
+                colDescrNum++;
+                colDescr = colDescriptions[colDescrNum] || {};
+                firstSeparator = false;
+            }
+
+            if (c >= nc) {
+                continue;
+            }
+
+            var sepwidth;
+            if (c > 0 || group.value.hskipBeforeAndAfter) {
+                sepwidth = utils.deflt(colDescr.pregap, arraycolsep);
+                if (sepwidth !== 0) {
+                    colSep = makeSpan(["arraycolsep"], []);
+                    colSep.style.width = sepwidth + "em";
+                    cols.push(colSep);
+                }
+            }
+
+            var col = [];
+            for (r = 0; r < nr; ++r) {
+                var row = body[r];
+                var elem = row[c];
+                if (!elem) {
+                    continue;
+                }
+                var shift = row.pos - offset;
+                elem.depth = row.depth;
+                elem.height = row.height;
+                col.push({type: "elem", elem: elem, shift: shift});
+            }
+
+            col = buildCommon.makeVList(col, "individualShift", null, options);
+            col = makeSpan(
+                ["col-align-" + (colDescr.align || "c")],
+                [col]);
+            cols.push(col);
+
+            if (c < nc - 1 || group.value.hskipBeforeAndAfter) {
+                sepwidth = utils.deflt(colDescr.postgap, arraycolsep);
+                if (sepwidth !== 0) {
+                    colSep = makeSpan(["arraycolsep"], []);
+                    colSep.style.width = sepwidth + "em";
+                    cols.push(colSep);
+                }
+            }
+        }
+        body = makeSpan(["mtable"], cols);
+        return makeSpan(["mord"], [body], options.getColor());
+    },
+
+    spacing: function(group, options, prev) {
+        if (group.value === "\\ " || group.value === "\\space" ||
+            group.value === " " || group.value === "~") {
+            // Spaces are generated by adding an actual space. Each of these
+            // things has an entry in the symbols table, so these will be turned
+            // into appropriate outputs.
+            return makeSpan(
+                ["mord", "mspace"],
+                [buildCommon.mathsym(group.value, group.mode)]
+            );
+        } else {
+            // Other kinds of spaces are of arbitrary width. We use CSS to
+            // generate these.
+            return makeSpan(
+                ["mord", "mspace",
+                 buildCommon.spacingFunctions[group.value].className]);
+        }
+    },
+
+    llap: function(group, options, prev) {
+        var inner = makeSpan(
+            ["inner"], [buildGroup(group.value.body, options.reset())]);
+        var fix = makeSpan(["fix"], []);
+        return makeSpan(
+            ["llap", options.style.cls()], [inner, fix]);
+    },
+
+    rlap: function(group, options, prev) {
+        var inner = makeSpan(
+            ["inner"], [buildGroup(group.value.body, options.reset())]);
+        var fix = makeSpan(["fix"], []);
+        return makeSpan(
+            ["rlap", options.style.cls()], [inner, fix]);
+    },
+
+    op: function(group, options, prev) {
+        // Operators are handled in the TeXbook pg. 443-444, rule 13(a).
+        var supGroup;
+        var subGroup;
+        var hasLimits = false;
+        if (group.type === "supsub" ) {
+            // If we have limits, supsub will pass us its group to handle. Pull
+            // out the superscript and subscript and set the group to the op in
+            // its base.
+            supGroup = group.value.sup;
+            subGroup = group.value.sub;
+            group = group.value.base;
+            hasLimits = true;
+        }
+
+        // Most operators have a large successor symbol, but these don't.
+        var noSuccessor = [
+            "\\smallint"
+        ];
+
+        var large = false;
+        if (options.style.size === Style.DISPLAY.size &&
+            group.value.symbol &&
+            !utils.contains(noSuccessor, group.value.body)) {
+
+            // Most symbol operators get larger in displaystyle (rule 13)
+            large = true;
+        }
+
+        var base;
+        var baseShift = 0;
+        var slant = 0;
+        if (group.value.symbol) {
+            // If this is a symbol, create the symbol.
+            var style = large ? "Size2-Regular" : "Size1-Regular";
+            base = buildCommon.makeSymbol(
+                group.value.body, style, "math", options.getColor(),
+                ["op-symbol", large ? "large-op" : "small-op", "mop"]);
+
+            // Shift the symbol so its center lies on the axis (rule 13). It
+            // appears that our fonts have the centers of the symbols already
+            // almost on the axis, so these numbers are very small. Note we
+            // don't actually apply this here, but instead it is used either in
+            // the vlist creation or separately when there are no limits.
+            baseShift = (base.height - base.depth) / 2 -
+                fontMetrics.metrics.axisHeight *
+                options.style.sizeMultiplier;
+
+            // The slant of the symbol is just its italic correction.
+            slant = base.italic;
+        } else {
+            // Otherwise, this is a text operator. Build the text from the
+            // operator's name.
+            // TODO(emily): Add a space in the middle of some of these
+            // operators, like \limsup
+            var output = [];
+            for (var i = 1; i < group.value.body.length; i++) {
+                output.push(buildCommon.mathsym(group.value.body[i], group.mode));
+            }
+            base = makeSpan(["mop"], output, options.getColor());
+        }
+
+        if (hasLimits) {
+            // IE 8 clips \int if it is in a display: inline-block. We wrap it
+            // in a new span so it is an inline, and works.
+            base = makeSpan([], [base]);
+
+            var supmid, supKern, submid, subKern;
+            // We manually have to handle the superscripts and subscripts. This,
+            // aside from the kern calculations, is copied from supsub.
+            if (supGroup) {
+                var sup = buildGroup(
+                    supGroup, options.withStyle(options.style.sup()));
+                supmid = makeSpan(
+                    [options.style.reset(), options.style.sup().cls()], [sup]);
+
+                supKern = Math.max(
+                    fontMetrics.metrics.bigOpSpacing1,
+                    fontMetrics.metrics.bigOpSpacing3 - sup.depth);
+            }
+
+            if (subGroup) {
+                var sub = buildGroup(
+                    subGroup, options.withStyle(options.style.sub()));
+                submid = makeSpan(
+                    [options.style.reset(), options.style.sub().cls()],
+                    [sub]);
+
+                subKern = Math.max(
+                    fontMetrics.metrics.bigOpSpacing2,
+                    fontMetrics.metrics.bigOpSpacing4 - sub.height);
+            }
+
+            // Build the final group as a vlist of the possible subscript, base,
+            // and possible superscript.
+            var finalGroup, top, bottom;
+            if (!supGroup) {
+                top = base.height - baseShift;
+
+                finalGroup = buildCommon.makeVList([
+                    {type: "kern", size: fontMetrics.metrics.bigOpSpacing5},
+                    {type: "elem", elem: submid},
+                    {type: "kern", size: subKern},
+                    {type: "elem", elem: base}
+                ], "top", top, options);
+
+                // Here, we shift the limits by the slant of the symbol. Note
+                // that we are supposed to shift the limits by 1/2 of the slant,
+                // but since we are centering the limits adding a full slant of
+                // margin will shift by 1/2 that.
+                finalGroup.children[0].style.marginLeft = -slant + "em";
+            } else if (!subGroup) {
+                bottom = base.depth + baseShift;
+
+                finalGroup = buildCommon.makeVList([
+                    {type: "elem", elem: base},
+                    {type: "kern", size: supKern},
+                    {type: "elem", elem: supmid},
+                    {type: "kern", size: fontMetrics.metrics.bigOpSpacing5}
+                ], "bottom", bottom, options);
+
+                // See comment above about slants
+                finalGroup.children[1].style.marginLeft = slant + "em";
+            } else if (!supGroup && !subGroup) {
+                // This case probably shouldn't occur (this would mean the
+                // supsub was sending us a group with no superscript or
+                // subscript) but be safe.
+                return base;
+            } else {
+                bottom = fontMetrics.metrics.bigOpSpacing5 +
+                    submid.height + submid.depth +
+                    subKern +
+                    base.depth + baseShift;
+
+                finalGroup = buildCommon.makeVList([
+                    {type: "kern", size: fontMetrics.metrics.bigOpSpacing5},
+                    {type: "elem", elem: submid},
+                    {type: "kern", size: subKern},
+                    {type: "elem", elem: base},
+                    {type: "kern", size: supKern},
+                    {type: "elem", elem: supmid},
+                    {type: "kern", size: fontMetrics.metrics.bigOpSpacing5}
+                ], "bottom", bottom, options);
+
+                // See comment above about slants
+                finalGroup.children[0].style.marginLeft = -slant + "em";
+                finalGroup.children[2].style.marginLeft = slant + "em";
+            }
+
+            return makeSpan(["mop", "op-limits"], [finalGroup]);
+        } else {
+            if (group.value.symbol) {
+                base.style.top = baseShift + "em";
+            }
+
+            return base;
+        }
+    },
+
+    katex: function(group, options, prev) {
+        // The KaTeX logo. The offsets for the K and a were chosen to look
+        // good, but the offsets for the T, E, and X were taken from the
+        // definition of \TeX in TeX (see TeXbook pg. 356)
+        var k = makeSpan(
+            ["k"], [buildCommon.mathsym("K", group.mode)]);
+        var a = makeSpan(
+            ["a"], [buildCommon.mathsym("A", group.mode)]);
+
+        a.height = (a.height + 0.2) * 0.75;
+        a.depth = (a.height - 0.2) * 0.75;
+
+        var t = makeSpan(
+            ["t"], [buildCommon.mathsym("T", group.mode)]);
+        var e = makeSpan(
+            ["e"], [buildCommon.mathsym("E", group.mode)]);
+
+        e.height = (e.height - 0.2155);
+        e.depth = (e.depth + 0.2155);
+
+        var x = makeSpan(
+            ["x"], [buildCommon.mathsym("X", group.mode)]);
+
+        return makeSpan(
+            ["katex-logo", "mord"], [k, a, t, e, x], options.getColor());
+    },
+
+    overline: function(group, options, prev) {
+        // Overlines are handled in the TeXbook pg 443, Rule 9.
+
+        // Build the inner group in the cramped style.
+        var innerGroup = buildGroup(group.value.body,
+                options.withStyle(options.style.cramp()));
+
+        var ruleWidth = fontMetrics.metrics.defaultRuleThickness /
+            options.style.sizeMultiplier;
+
+        // Create the line above the body
+        var line = makeSpan(
+            [options.style.reset(), Style.TEXT.cls(), "overline-line"]);
+        line.height = ruleWidth;
+        line.maxFontSize = 1.0;
+
+        // Generate the vlist, with the appropriate kerns
+        var vlist = buildCommon.makeVList([
+            {type: "elem", elem: innerGroup},
+            {type: "kern", size: 3 * ruleWidth},
+            {type: "elem", elem: line},
+            {type: "kern", size: ruleWidth}
+        ], "firstBaseline", null, options);
+
+        return makeSpan(["overline", "mord"], [vlist], options.getColor());
+    },
+
+    sqrt: function(group, options, prev) {
+        // Square roots are handled in the TeXbook pg. 443, Rule 11.
+
+        // First, we do the same steps as in overline to build the inner group
+        // and line
+        var inner = buildGroup(group.value.body,
+                options.withStyle(options.style.cramp()));
+
+        var ruleWidth = fontMetrics.metrics.defaultRuleThickness /
+            options.style.sizeMultiplier;
+
+        var line = makeSpan(
+            [options.style.reset(), Style.TEXT.cls(), "sqrt-line"], [],
+            options.getColor());
+        line.height = ruleWidth;
+        line.maxFontSize = 1.0;
+
+        var phi = ruleWidth;
+        if (options.style.id < Style.TEXT.id) {
+            phi = fontMetrics.metrics.xHeight;
+        }
+
+        // Calculate the clearance between the body and line
+        var lineClearance = ruleWidth + phi / 4;
+
+        var innerHeight =
+            (inner.height + inner.depth) * options.style.sizeMultiplier;
+        var minDelimiterHeight = innerHeight + lineClearance + ruleWidth;
+
+        // Create a \surd delimiter of the required minimum size
+        var delim = makeSpan(["sqrt-sign"], [
+            delimiter.customSizedDelim("\\surd", minDelimiterHeight,
+                                       false, options, group.mode)],
+                             options.getColor());
+
+        var delimDepth = (delim.height + delim.depth) - ruleWidth;
+
+        // Adjust the clearance based on the delimiter size
+        if (delimDepth > inner.height + inner.depth + lineClearance) {
+            lineClearance =
+                (lineClearance + delimDepth - inner.height - inner.depth) / 2;
+        }
+
+        // Shift the delimiter so that its top lines up with the top of the line
+        var delimShift = -(inner.height + lineClearance + ruleWidth) + delim.height;
+        delim.style.top = delimShift + "em";
+        delim.height -= delimShift;
+        delim.depth += delimShift;
+
+        // We add a special case here, because even when `inner` is empty, we
+        // still get a line. So, we use a simple heuristic to decide if we
+        // should omit the body entirely. (note this doesn't work for something
+        // like `\sqrt{\rlap{x}}`, but if someone is doing that they deserve for
+        // it not to work.
+        var body;
+        if (inner.height === 0 && inner.depth === 0) {
+            body = makeSpan();
+        } else {
+            body = buildCommon.makeVList([
+                {type: "elem", elem: inner},
+                {type: "kern", size: lineClearance},
+                {type: "elem", elem: line},
+                {type: "kern", size: ruleWidth}
+            ], "firstBaseline", null, options);
+        }
+
+        if (!group.value.index) {
+            return makeSpan(["sqrt", "mord"], [delim, body]);
+        } else {
+            // Handle the optional root index
+
+            // The index is always in scriptscript style
+            var root = buildGroup(
+                group.value.index,
+                options.withStyle(Style.SCRIPTSCRIPT));
+            var rootWrap = makeSpan(
+                [options.style.reset(), Style.SCRIPTSCRIPT.cls()],
+                [root]);
+
+            // Figure out the height and depth of the inner part
+            var innerRootHeight = Math.max(delim.height, body.height);
+            var innerRootDepth = Math.max(delim.depth, body.depth);
+
+            // The amount the index is shifted by. This is taken from the TeX
+            // source, in the definition of `\r@@t`.
+            var toShift = 0.6 * (innerRootHeight - innerRootDepth);
+
+            // Build a VList with the superscript shifted up correctly
+            var rootVList = buildCommon.makeVList(
+                [{type: "elem", elem: rootWrap}],
+                "shift", -toShift, options);
+            // Add a class surrounding it so we can add on the appropriate
+            // kerning
+            var rootVListWrap = makeSpan(["root"], [rootVList]);
+
+            return makeSpan(["sqrt", "mord"], [rootVListWrap, delim, body]);
+        }
+    },
+
+    sizing: function(group, options, prev) {
+        // Handle sizing operators like \Huge. Real TeX doesn't actually allow
+        // these functions inside of math expressions, so we do some special
+        // handling.
+        var inner = buildExpression(group.value.value,
+                options.withSize(group.value.size), prev);
+
+        var span = makeSpan(["mord"],
+            [makeSpan(["sizing", "reset-" + options.size, group.value.size,
+                       options.style.cls()],
+                      inner)]);
+
+        // Calculate the correct maxFontSize manually
+        var fontSize = buildCommon.sizingMultiplier[group.value.size];
+        span.maxFontSize = fontSize * options.style.sizeMultiplier;
+
+        return span;
+    },
+
+    styling: function(group, options, prev) {
+        // Style changes are handled in the TeXbook on pg. 442, Rule 3.
+
+        // Figure out what style we're changing to.
+        var style = {
+            "display": Style.DISPLAY,
+            "text": Style.TEXT,
+            "script": Style.SCRIPT,
+            "scriptscript": Style.SCRIPTSCRIPT
+        };
+
+        var newStyle = style[group.value.style];
+
+        // Build the inner expression in the new style.
+        var inner = buildExpression(
+            group.value.value, options.withStyle(newStyle), prev);
+
+        return makeSpan([options.style.reset(), newStyle.cls()], inner);
+    },
+
+    font: function(group, options, prev) {
+        var font = group.value.font;
+        return buildGroup(group.value.body, options.withFont(font), prev);
+    },
+
+    delimsizing: function(group, options, prev) {
+        var delim = group.value.value;
+
+        if (delim === ".") {
+            // Empty delimiters still count as elements, even though they don't
+            // show anything.
+            return makeSpan([groupToType[group.value.delimType]]);
+        }
+
+        // Use delimiter.sizedDelim to generate the delimiter.
+        return makeSpan(
+            [groupToType[group.value.delimType]],
+            [delimiter.sizedDelim(
+                delim, group.value.size, options, group.mode)]);
+    },
+
+    leftright: function(group, options, prev) {
+        // Build the inner expression
+        var inner = buildExpression(group.value.body, options.reset());
+
+        var innerHeight = 0;
+        var innerDepth = 0;
+
+        // Calculate its height and depth
+        for (var i = 0; i < inner.length; i++) {
+            innerHeight = Math.max(inner[i].height, innerHeight);
+            innerDepth = Math.max(inner[i].depth, innerDepth);
+        }
+
+        // The size of delimiters is the same, regardless of what style we are
+        // in. Thus, to correctly calculate the size of delimiter we need around
+        // a group, we scale down the inner size based on the size.
+        innerHeight *= options.style.sizeMultiplier;
+        innerDepth *= options.style.sizeMultiplier;
+
+        var leftDelim;
+        if (group.value.left === ".") {
+            // Empty delimiters in \left and \right make null delimiter spaces.
+            leftDelim = makeNullDelimiter(options);
+        } else {
+            // Otherwise, use leftRightDelim to generate the correct sized
+            // delimiter.
+            leftDelim = delimiter.leftRightDelim(
+                group.value.left, innerHeight, innerDepth, options,
+                group.mode);
+        }
+        // Add it to the beginning of the expression
+        inner.unshift(leftDelim);
+
+        var rightDelim;
+        // Same for the right delimiter
+        if (group.value.right === ".") {
+            rightDelim = makeNullDelimiter(options);
+        } else {
+            rightDelim = delimiter.leftRightDelim(
+                group.value.right, innerHeight, innerDepth, options,
+                group.mode);
+        }
+        // Add it to the end of the expression.
+        inner.push(rightDelim);
+
+        return makeSpan(
+            ["minner", options.style.cls()], inner, options.getColor());
+    },
+
+    rule: function(group, options, prev) {
+        // Make an empty span for the rule
+        var rule = makeSpan(["mord", "rule"], [], options.getColor());
+
+        // Calculate the shift, width, and height of the rule, and account for units
+        var shift = 0;
+        if (group.value.shift) {
+            shift = group.value.shift.number;
+            if (group.value.shift.unit === "ex") {
+                shift *= fontMetrics.metrics.xHeight;
+            }
+        }
+
+        var width = group.value.width.number;
+        if (group.value.width.unit === "ex") {
+            width *= fontMetrics.metrics.xHeight;
+        }
+
+        var height = group.value.height.number;
+        if (group.value.height.unit === "ex") {
+            height *= fontMetrics.metrics.xHeight;
+        }
+
+        // The sizes of rules are absolute, so make it larger if we are in a
+        // smaller style.
+        shift /= options.style.sizeMultiplier;
+        width /= options.style.sizeMultiplier;
+        height /= options.style.sizeMultiplier;
+
+        // Style the rule to the right size
+        rule.style.borderRightWidth = width + "em";
+        rule.style.borderTopWidth = height + "em";
+        rule.style.bottom = shift + "em";
+
+        // Record the height and width
+        rule.width = width;
+        rule.height = height + shift;
+        rule.depth = -shift;
+
+        return rule;
+    },
+
+    accent: function(group, options, prev) {
+        // Accents are handled in the TeXbook pg. 443, rule 12.
+        var base = group.value.base;
+
+        var supsubGroup;
+        if (group.type === "supsub") {
+            // If our base is a character box, and we have superscripts and
+            // subscripts, the supsub will defer to us. In particular, we want
+            // to attach the superscripts and subscripts to the inner body (so
+            // that the position of the superscripts and subscripts won't be
+            // affected by the height of the accent). We accomplish this by
+            // sticking the base of the accent into the base of the supsub, and
+            // rendering that, while keeping track of where the accent is.
+
+            // The supsub group is the group that was passed in
+            var supsub = group;
+            // The real accent group is the base of the supsub group
+            group = supsub.value.base;
+            // The character box is the base of the accent group
+            base = group.value.base;
+            // Stick the character box into the base of the supsub group
+            supsub.value.base = base;
+
+            // Rerender the supsub group with its new base, and store that
+            // result.
+            supsubGroup = buildGroup(
+                supsub, options.reset(), prev);
+        }
+
+        // Build the base group
+        var body = buildGroup(
+            base, options.withStyle(options.style.cramp()));
+
+        // Calculate the skew of the accent. This is based on the line "If the
+        // nucleus is not a single character, let s = 0; otherwise set s to the
+        // kern amount for the nucleus followed by the \skewchar of its font."
+        // Note that our skew metrics are just the kern between each character
+        // and the skewchar.
+        var skew;
+        if (isCharacterBox(base)) {
+            // If the base is a character box, then we want the skew of the
+            // innermost character. To do that, we find the innermost character:
+            var baseChar = getBaseElem(base);
+            // Then, we render its group to get the symbol inside it
+            var baseGroup = buildGroup(
+                baseChar, options.withStyle(options.style.cramp()));
+            // Finally, we pull the skew off of the symbol.
+            skew = baseGroup.skew;
+            // Note that we now throw away baseGroup, because the layers we
+            // removed with getBaseElem might contain things like \color which
+            // we can't get rid of.
+            // TODO(emily): Find a better way to get the skew
+        } else {
+            skew = 0;
+        }
+
+        // calculate the amount of space between the body and the accent
+        var clearance = Math.min(body.height, fontMetrics.metrics.xHeight);
+
+        // Build the accent
+        var accent = buildCommon.makeSymbol(
+            group.value.accent, "Main-Regular", "math", options.getColor());
+        // Remove the italic correction of the accent, because it only serves to
+        // shift the accent over to a place we don't want.
+        accent.italic = 0;
+
+        // The \vec character that the fonts use is a combining character, and
+        // thus shows up much too far to the left. To account for this, we add a
+        // specific class which shifts the accent over to where we want it.
+        // TODO(emily): Fix this in a better way, like by changing the font
+        var vecClass = group.value.accent === "\\vec" ? "accent-vec" : null;
+
+        var accentBody = makeSpan(["accent-body", vecClass], [
+            makeSpan([], [accent])]);
+
+        accentBody = buildCommon.makeVList([
+            {type: "elem", elem: body},
+            {type: "kern", size: -clearance},
+            {type: "elem", elem: accentBody}
+        ], "firstBaseline", null, options);
+
+        // Shift the accent over by the skew. Note we shift by twice the skew
+        // because we are centering the accent, so by adding 2*skew to the left,
+        // we shift it to the right by 1*skew.
+        accentBody.children[1].style.marginLeft = 2 * skew + "em";
+
+        var accentWrap = makeSpan(["mord", "accent"], [accentBody]);
+
+        if (supsubGroup) {
+            // Here, we replace the "base" child of the supsub with our newly
+            // generated accent.
+            supsubGroup.children[0] = accentWrap;
+
+            // Since we don't rerun the height calculation after replacing the
+            // accent, we manually recalculate height.
+            supsubGroup.height = Math.max(accentWrap.height, supsubGroup.height);
+
+            // Accents should always be ords, even when their innards are not.
+            supsubGroup.classes[0] = "mord";
+
+            return supsubGroup;
+        } else {
+            return accentWrap;
+        }
+    },
+
+    phantom: function(group, options, prev) {
+        var elements = buildExpression(
+            group.value.value,
+            options.withPhantom(),
+            prev
+        );
+
+        // \phantom isn't supposed to affect the elements it contains.
+        // See "color" for more details.
+        return new buildCommon.makeFragment(elements);
+    }
+};
+
+/**
+ * buildGroup is the function that takes a group and calls the correct groupType
+ * function for it. It also handles the interaction of size and style changes
+ * between parents and children.
+ */
+var buildGroup = function(group, options, prev) {
+    if (!group) {
+        return makeSpan();
+    }
+
+    if (groupTypes[group.type]) {
+        // Call the groupTypes function
+        var groupNode = groupTypes[group.type](group, options, prev);
+        var multiplier;
+
+        // If the style changed between the parent and the current group,
+        // account for the size difference
+        if (options.style !== options.parentStyle) {
+            multiplier = options.style.sizeMultiplier /
+                    options.parentStyle.sizeMultiplier;
+
+            groupNode.height *= multiplier;
+            groupNode.depth *= multiplier;
+        }
+
+        // If the size changed between the parent and the current group, account
+        // for that size difference.
+        if (options.size !== options.parentSize) {
+            multiplier = buildCommon.sizingMultiplier[options.size] /
+                    buildCommon.sizingMultiplier[options.parentSize];
+
+            groupNode.height *= multiplier;
+            groupNode.depth *= multiplier;
+        }
+
+        return groupNode;
+    } else {
+        throw new ParseError(
+            "Got group of unknown type: '" + group.type + "'");
+    }
+};
+
+/**
+ * Take an entire parse tree, and build it into an appropriate set of HTML
+ * nodes.
+ */
+var buildHTML = function(tree, options) {
+    // buildExpression is destructive, so we need to make a clone
+    // of the incoming tree so that it isn't accidentally changed
+    tree = JSON.parse(JSON.stringify(tree));
+
+    // Build the expression contained in the tree
+    var expression = buildExpression(tree, options);
+    var body = makeSpan(["base", options.style.cls()], expression);
+
+    // Add struts, which ensure that the top of the HTML element falls at the
+    // height of the expression, and the bottom of the HTML element falls at the
+    // depth of the expression.
+    var topStrut = makeSpan(["strut"]);
+    var bottomStrut = makeSpan(["strut", "bottom"]);
+
+    topStrut.style.height = body.height + "em";
+    bottomStrut.style.height = (body.height + body.depth) + "em";
+    // We'd like to use `vertical-align: top` but in IE 9 this lowers the
+    // baseline of the box to the bottom of this strut (instead staying in the
+    // normal place) so we use an absolute value for vertical-align instead
+    bottomStrut.style.verticalAlign = -body.depth + "em";
+
+    // Wrap the struts and body together
+    var htmlNode = makeSpan(["katex-html"], [topStrut, bottomStrut, body]);
+
+    htmlNode.setAttribute("aria-hidden", "true");
+
+    return htmlNode;
+};
+
+module.exports = buildHTML;
+
+},{"./ParseError":7,"./Style":10,"./buildCommon":11,"./delimiter":15,"./domTree":16,"./fontMetrics":18,"./utils":25}],13:[function(require,module,exports){
+/**
+ * This file converts a parse tree into a cooresponding MathML tree. The main
+ * entry point is the `buildMathML` function, which takes a parse tree from the
+ * parser.
+ */
+
+var buildCommon = require("./buildCommon");
+var fontMetrics = require("./fontMetrics");
+var mathMLTree = require("./mathMLTree");
+var ParseError = require("./ParseError");
+var symbols = require("./symbols");
+var utils = require("./utils");
+
+var makeSpan = buildCommon.makeSpan;
+var fontMap = buildCommon.fontMap;
+
+/**
+ * Takes a symbol and converts it into a MathML text node after performing
+ * optional replacement from symbols.js.
+ */
+var makeText = function(text, mode) {
+    if (symbols[mode][text] && symbols[mode][text].replace) {
+        text = symbols[mode][text].replace;
+    }
+
+    return new mathMLTree.TextNode(text);
+};
+
+/**
+ * Returns the math variant as a string or null if none is required.
+ */
+var getVariant = function(group, options) {
+    var font = options.font;
+    if (!font) {
+        return null;
+    }
+
+    var mode = group.mode;
+    if (font === "mathit") {
+        return "italic";
+    }
+
+    var value = group.value;
+    if (utils.contains(["\\imath", "\\jmath"], value)) {
+        return null;
+    }
+
+    if (symbols[mode][value] && symbols[mode][value].replace) {
+        value = symbols[mode][value].replace;
+    }
+
+    var fontName = fontMap[font].fontName;
+    if (fontMetrics.getCharacterMetrics(value, fontName)) {
+        return fontMap[options.font].variant;
+    }
+
+    return null;
+};
+
+/**
+ * Functions for handling the different types of groups found in the parse
+ * tree. Each function should take a parse group and return a MathML node.
+ */
+var groupTypes = {
+    mathord: function(group, options) {
+        var node = new mathMLTree.MathNode(
+            "mi",
+            [makeText(group.value, group.mode)]);
+
+        var variant = getVariant(group, options);
+        if (variant) {
+            node.setAttribute("mathvariant", variant);
+        }
+        return node;
+    },
+
+    textord: function(group, options) {
+        var text = makeText(group.value, group.mode);
+
+        var variant = getVariant(group, options) || "normal";
+
+        var node;
+        if (/[0-9]/.test(group.value)) {
+            // TODO(kevinb) merge adjacent <mn> nodes
+            // do it as a post processing step
+            node = new mathMLTree.MathNode("mn", [text]);
+            if (options.font) {
+                node.setAttribute("mathvariant", variant);
+            }
+        } else {
+            node = new mathMLTree.MathNode("mi", [text]);
+            node.setAttribute("mathvariant", variant);
+        }
+
+        return node;
+    },
+
+    bin: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        return node;
+    },
+
+    rel: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        return node;
+    },
+
+    open: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        return node;
+    },
+
+    close: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        return node;
+    },
+
+    inner: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        return node;
+    },
+
+    punct: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mo", [makeText(group.value, group.mode)]);
+
+        node.setAttribute("separator", "true");
+
+        return node;
+    },
+
+    ordgroup: function(group, options) {
+        var inner = buildExpression(group.value, options);
+
+        var node = new mathMLTree.MathNode("mrow", inner);
+
+        return node;
+    },
+
+    text: function(group, options) {
+        var inner = buildExpression(group.value.body, options);
+
+        var node = new mathMLTree.MathNode("mtext", inner);
+
+        return node;
+    },
+
+    color: function(group, options) {
+        var inner = buildExpression(group.value.value, options);
+
+        var node = new mathMLTree.MathNode("mstyle", inner);
+
+        node.setAttribute("mathcolor", group.value.color);
+
+        return node;
+    },
+
+    supsub: function(group, options) {
+        var children = [buildGroup(group.value.base, options)];
+
+        if (group.value.sub) {
+            children.push(buildGroup(group.value.sub, options));
+        }
+
+        if (group.value.sup) {
+            children.push(buildGroup(group.value.sup, options));
+        }
+
+        var nodeType;
+        if (!group.value.sub) {
+            nodeType = "msup";
+        } else if (!group.value.sup) {
+            nodeType = "msub";
+        } else {
+            nodeType = "msubsup";
+        }
+
+        var node = new mathMLTree.MathNode(nodeType, children);
+
+        return node;
+    },
+
+    genfrac: function(group, options) {
+        var node = new mathMLTree.MathNode(
+            "mfrac",
+            [buildGroup(group.value.numer, options),
+             buildGroup(group.value.denom, options)]);
+
+        if (!group.value.hasBarLine) {
+            node.setAttribute("linethickness", "0px");
+        }
+
+        if (group.value.leftDelim != null || group.value.rightDelim != null) {
+            var withDelims = [];
+
+            if (group.value.leftDelim != null) {
+                var leftOp = new mathMLTree.MathNode(
+                    "mo", [new mathMLTree.TextNode(group.value.leftDelim)]);
+
+                leftOp.setAttribute("fence", "true");
+
+                withDelims.push(leftOp);
+            }
+
+            withDelims.push(node);
+
+            if (group.value.rightDelim != null) {
+                var rightOp = new mathMLTree.MathNode(
+                    "mo", [new mathMLTree.TextNode(group.value.rightDelim)]);
+
+                rightOp.setAttribute("fence", "true");
+
+                withDelims.push(rightOp);
+            }
+
+            var outerNode = new mathMLTree.MathNode("mrow", withDelims);
+
+            return outerNode;
+        }
+
+        return node;
+    },
+
+    array: function(group, options) {
+        return new mathMLTree.MathNode(
+            "mtable", group.value.body.map(function(row) {
+                return new mathMLTree.MathNode(
+                    "mtr", row.map(function(cell) {
+                        return new mathMLTree.MathNode(
+                            "mtd", [buildGroup(cell, options)]);
+                    }));
+            }));
+    },
+
+    sqrt: function(group, options) {
+        var node;
+        if (group.value.index) {
+            node = new mathMLTree.MathNode(
+                "mroot", [
+                    buildGroup(group.value.body, options),
+                    buildGroup(group.value.index, options)
+                ]);
+        } else {
+            node = new mathMLTree.MathNode(
+                "msqrt", [buildGroup(group.value.body, options)]);
+        }
+
+        return node;
+    },
+
+    leftright: function(group, options) {
+        var inner = buildExpression(group.value.body, options);
+
+        if (group.value.left !== ".") {
+            var leftNode = new mathMLTree.MathNode(
+                "mo", [makeText(group.value.left, group.mode)]);
+
+            leftNode.setAttribute("fence", "true");
+
+            inner.unshift(leftNode);
+        }
+
+        if (group.value.right !== ".") {
+            var rightNode = new mathMLTree.MathNode(
+                "mo", [makeText(group.value.right, group.mode)]);
+
+            rightNode.setAttribute("fence", "true");
+
+            inner.push(rightNode);
+        }
+
+        var outerNode = new mathMLTree.MathNode("mrow", inner);
+
+        return outerNode;
+    },
+
+    accent: function(group, options) {
+        var accentNode = new mathMLTree.MathNode(
+            "mo", [makeText(group.value.accent, group.mode)]);
+
+        var node = new mathMLTree.MathNode(
+            "mover",
+            [buildGroup(group.value.base, options),
+             accentNode]);
+
+        node.setAttribute("accent", "true");
+
+        return node;
+    },
+
+    spacing: function(group) {
+        var node;
+
+        if (group.value === "\\ " || group.value === "\\space" ||
+            group.value === " " || group.value === "~") {
+            node = new mathMLTree.MathNode(
+                "mtext", [new mathMLTree.TextNode("\u00a0")]);
+        } else {
+            node = new mathMLTree.MathNode("mspace");
+
+            node.setAttribute(
+                "width", buildCommon.spacingFunctions[group.value].size);
+        }
+
+        return node;
+    },
+
+    op: function(group) {
+        var node;
+
+        // TODO(emily): handle big operators using the `largeop` attribute
+
+        if (group.value.symbol) {
+            // This is a symbol. Just add the symbol.
+            node = new mathMLTree.MathNode(
+                "mo", [makeText(group.value.body, group.mode)]);
+        } else {
+            // This is a text operator. Add all of the characters from the
+            // operator's name.
+            // TODO(emily): Add a space in the middle of some of these
+            // operators, like \limsup.
+            node = new mathMLTree.MathNode(
+                "mi", [new mathMLTree.TextNode(group.value.body.slice(1))]);
+        }
+
+        return node;
+    },
+
+    katex: function(group) {
+        var node = new mathMLTree.MathNode(
+            "mtext", [new mathMLTree.TextNode("KaTeX")]);
+
+        return node;
+    },
+
+    font: function(group, options) {
+        var font = group.value.font;
+        return buildGroup(group.value.body, options.withFont(font));
+    },
+
+    delimsizing: function(group) {
+        var children = [];
+
+        if (group.value.value !== ".") {
+            children.push(makeText(group.value.value, group.mode));
+        }
+
+        var node = new mathMLTree.MathNode("mo", children);
+
+        if (group.value.delimType === "open" ||
+            group.value.delimType === "close") {
+            // Only some of the delimsizing functions act as fences, and they
+            // return "open" or "close" delimTypes.
+            node.setAttribute("fence", "true");
+        } else {
+            // Explicitly disable fencing if it's not a fence, to override the
+            // defaults.
+            node.setAttribute("fence", "false");
+        }
+
+        return node;
+    },
+
+    styling: function(group, options) {
+        var inner = buildExpression(group.value.value, options);
+
+        var node = new mathMLTree.MathNode("mstyle", inner);
+
+        var styleAttributes = {
+            "display": ["0", "true"],
+            "text": ["0", "false"],
+            "script": ["1", "false"],
+            "scriptscript": ["2", "false"]
+        };
+
+        var attr = styleAttributes[group.value.style];
+
+        node.setAttribute("scriptlevel", attr[0]);
+        node.setAttribute("displaystyle", attr[1]);
+
+        return node;
+    },
+
+    sizing: function(group, options) {
+        var inner = buildExpression(group.value.value, options);
+
+        var node = new mathMLTree.MathNode("mstyle", inner);
+
+        // TODO(emily): This doesn't produce the correct size for nested size
+        // changes, because we don't keep state of what style we're currently
+        // in, so we can't reset the size to normal before changing it.  Now
+        // that we're passing an options parameter we should be able to fix
+        // this.
+        node.setAttribute(
+            "mathsize", buildCommon.sizingMultiplier[group.value.size] + "em");
+
+        return node;
+    },
+
+    overline: function(group, options) {
+        var operator = new mathMLTree.MathNode(
+            "mo", [new mathMLTree.TextNode("\u203e")]);
+        operator.setAttribute("stretchy", "true");
+
+        var node = new mathMLTree.MathNode(
+            "mover",
+            [buildGroup(group.value.body, options),
+             operator]);
+        node.setAttribute("accent", "true");
+
+        return node;
+    },
+
+    rule: function(group) {
+        // TODO(emily): Figure out if there's an actual way to draw black boxes
+        // in MathML.
+        var node = new mathMLTree.MathNode("mrow");
+
+        return node;
+    },
+
+    llap: function(group, options) {
+        var node = new mathMLTree.MathNode(
+            "mpadded", [buildGroup(group.value.body, options)]);
+
+        node.setAttribute("lspace", "-1width");
+        node.setAttribute("width", "0px");
+
+        return node;
+    },
+
+    rlap: function(group, options) {
+        var node = new mathMLTree.MathNode(
+            "mpadded", [buildGroup(group.value.body, options)]);
+
+        node.setAttribute("width", "0px");
+
+        return node;
+    },
+
+    phantom: function(group, options, prev) {
+        var inner = buildExpression(group.value.value, options);
+        return new mathMLTree.MathNode("mphantom", inner);
+    }
+};
+
+/**
+ * Takes a list of nodes, builds them, and returns a list of the generated
+ * MathML nodes. A little simpler than the HTML version because we don't do any
+ * previous-node handling.
+ */
+var buildExpression = function(expression, options) {
+    var groups = [];
+    for (var i = 0; i < expression.length; i++) {
+        var group = expression[i];
+        groups.push(buildGroup(group, options));
+    }
+    return groups;
+};
+
+/**
+ * Takes a group from the parser and calls the appropriate groupTypes function
+ * on it to produce a MathML node.
+ */
+var buildGroup = function(group, options) {
+    if (!group) {
+        return new mathMLTree.MathNode("mrow");
+    }
+
+    if (groupTypes[group.type]) {
+        // Call the groupTypes function
+        return groupTypes[group.type](group, options);
+    } else {
+        throw new ParseError(
+            "Got group of unknown type: '" + group.type + "'");
+    }
+};
+
+/**
+ * Takes a full parse tree and settings and builds a MathML representation of
+ * it. In particular, we put the elements from building the parse tree into a
+ * <semantics> tag so we can also include that TeX source as an annotation.
+ *
+ * Note that we actually return a domTree element with a `<math>` inside it so
+ * we can do appropriate styling.
+ */
+var buildMathML = function(tree, texExpression, options) {
+    var expression = buildExpression(tree, options);
+
+    // Wrap up the expression in an mrow so it is presented in the semantics
+    // tag correctly.
+    var wrapper = new mathMLTree.MathNode("mrow", expression);
+
+    // Build a TeX annotation of the source
+    var annotation = new mathMLTree.MathNode(
+        "annotation", [new mathMLTree.TextNode(texExpression)]);
+
+    annotation.setAttribute("encoding", "application/x-tex");
+
+    var semantics = new mathMLTree.MathNode(
+        "semantics", [wrapper, annotation]);
+
+    var math = new mathMLTree.MathNode("math", [semantics]);
+
+    // You can't style <math> nodes, so we wrap the node in a span.
+    return makeSpan(["katex-mathml"], [math]);
+};
+
+module.exports = buildMathML;
+
+},{"./ParseError":7,"./buildCommon":11,"./fontMetrics":18,"./mathMLTree":21,"./symbols":24,"./utils":25}],14:[function(require,module,exports){
+var buildHTML = require("./buildHTML");
+var buildMathML = require("./buildMathML");
+var buildCommon = require("./buildCommon");
+var Options = require("./Options");
+var Settings = require("./Settings");
+var Style = require("./Style");
+
+var makeSpan = buildCommon.makeSpan;
+
+var buildTree = function(tree, expression, settings) {
+    settings = settings || new Settings({});
+
+    var startStyle = Style.TEXT;
+    if (settings.displayMode) {
+        startStyle = Style.DISPLAY;
+    }
+
+    // Setup the default options
+    var options = new Options({
+        style: startStyle,
+        size: "size5"
+    });
+
+    // `buildHTML` sometimes messes with the parse tree (like turning bins ->
+    // ords), so we build the MathML version first.
+    var mathMLNode = buildMathML(tree, expression, options);
+    var htmlNode = buildHTML(tree, options);
+
+    var katexNode = makeSpan(["katex"], [
+        mathMLNode, htmlNode
+    ]);
+
+    if (settings.displayMode) {
+        return makeSpan(["katex-display"], [katexNode]);
+    } else {
+        return katexNode;
+    }
+};
+
+module.exports = buildTree;
+
+},{"./Options":6,"./Settings":9,"./Style":10,"./buildCommon":11,"./buildHTML":12,"./buildMathML":13}],15:[function(require,module,exports){
+/**
+ * This file deals with creating delimiters of various sizes. The TeXbook
+ * discusses these routines on page 441-442, in the "Another subroutine sets box
+ * x to a specified variable delimiter" paragraph.
+ *
+ * There are three main routines here. `makeSmallDelim` makes a delimiter in the
+ * normal font, but in either text, script, or scriptscript style.
+ * `makeLargeDelim` makes a delimiter in textstyle, but in one of the Size1,
+ * Size2, Size3, or Size4 fonts. `makeStackedDelim` makes a delimiter out of
+ * smaller pieces that are stacked on top of one another.
+ *
+ * The functions take a parameter `center`, which determines if the delimiter
+ * should be centered around the axis.
+ *
+ * Then, there are three exposed functions. `sizedDelim` makes a delimiter in
+ * one of the given sizes. This is used for things like `\bigl`.
+ * `customSizedDelim` makes a delimiter with a given total height+depth. It is
+ * called in places like `\sqrt`. `leftRightDelim` makes an appropriate
+ * delimiter which surrounds an expression of a given height an depth. It is
+ * used in `\left` and `\right`.
+ */
+
+var ParseError = require("./ParseError");
+var Style = require("./Style");
+
+var buildCommon = require("./buildCommon");
+var fontMetrics = require("./fontMetrics");
+var symbols = require("./symbols");
+var utils = require("./utils");
+
+var makeSpan = buildCommon.makeSpan;
+
+/**
+ * Get the metrics for a given symbol and font, after transformation (i.e.
+ * after following replacement from symbols.js)
+ */
+var getMetrics = function(symbol, font) {
+    if (symbols.math[symbol] && symbols.math[symbol].replace) {
+        return fontMetrics.getCharacterMetrics(
+            symbols.math[symbol].replace, font);
+    } else {
+        return fontMetrics.getCharacterMetrics(
+            symbol, font);
+    }
+};
+
+/**
+ * Builds a symbol in the given font size (note size is an integer)
+ */
+var mathrmSize = function(value, size, mode) {
+    return buildCommon.makeSymbol(value, "Size" + size + "-Regular", mode);
+};
+
+/**
+ * Puts a delimiter span in a given style, and adds appropriate height, depth,
+ * and maxFontSizes.
+ */
+var styleWrap = function(delim, toStyle, options) {
+    var span = makeSpan(
+        ["style-wrap", options.style.reset(), toStyle.cls()], [delim]);
+
+    var multiplier = toStyle.sizeMultiplier / options.style.sizeMultiplier;
+
+    span.height *= multiplier;
+    span.depth *= multiplier;
+    span.maxFontSize = toStyle.sizeMultiplier;
+
+    return span;
+};
+
+/**
+ * Makes a small delimiter. This is a delimiter that comes in the Main-Regular
+ * font, but is restyled to either be in textstyle, scriptstyle, or
+ * scriptscriptstyle.
+ */
+var makeSmallDelim = function(delim, style, center, options, mode) {
+    var text = buildCommon.makeSymbol(delim, "Main-Regular", mode);
+
+    var span = styleWrap(text, style, options);
+
+    if (center) {
+        var shift =
+            (1 - options.style.sizeMultiplier / style.sizeMultiplier) *
+            fontMetrics.metrics.axisHeight;
+
+        span.style.top = shift + "em";
+        span.height -= shift;
+        span.depth += shift;
+    }
+
+    return span;
+};
+
+/**
+ * Makes a large delimiter. This is a delimiter that comes in the Size1, Size2,
+ * Size3, or Size4 fonts. It is always rendered in textstyle.
+ */
+var makeLargeDelim = function(delim, size, center, options, mode) {
+    var inner = mathrmSize(delim, size, mode);
+
+    var span = styleWrap(
+        makeSpan(["delimsizing", "size" + size],
+                 [inner], options.getColor()),
+        Style.TEXT, options);
+
+    if (center) {
+        var shift = (1 - options.style.sizeMultiplier) *
+            fontMetrics.metrics.axisHeight;
+
+        span.style.top = shift + "em";
+        span.height -= shift;
+        span.depth += shift;
+    }
+
+    return span;
+};
+
+/**
+ * Make an inner span with the given offset and in the given font. This is used
+ * in `makeStackedDelim` to make the stacking pieces for the delimiter.
+ */
+var makeInner = function(symbol, font, mode) {
+    var sizeClass;
+    // Apply the correct CSS class to choose the right font.
+    if (font === "Size1-Regular") {
+        sizeClass = "delim-size1";
+    } else if (font === "Size4-Regular") {
+        sizeClass = "delim-size4";
+    }
+
+    var inner = makeSpan(
+        ["delimsizinginner", sizeClass],
+        [makeSpan([], [buildCommon.makeSymbol(symbol, font, mode)])]);
+
+    // Since this will be passed into `makeVList` in the end, wrap the element
+    // in the appropriate tag that VList uses.
+    return {type: "elem", elem: inner};
+};
+
+/**
+ * Make a stacked delimiter out of a given delimiter, with the total height at
+ * least `heightTotal`. This routine is mentioned on page 442 of the TeXbook.
+ */
+var makeStackedDelim = function(delim, heightTotal, center, options, mode) {
+    // There are four parts, the top, an optional middle, a repeated part, and a
+    // bottom.
+    var top, middle, repeat, bottom;
+    top = repeat = bottom = delim;
+    middle = null;
+    // Also keep track of what font the delimiters are in
+    var font = "Size1-Regular";
+
+    // We set the parts and font based on the symbol. Note that we use
+    // '\u23d0' instead of '|' and '\u2016' instead of '\\|' for the
+    // repeats of the arrows
+    if (delim === "\\uparrow") {
+        repeat = bottom = "\u23d0";
+    } else if (delim === "\\Uparrow") {
+        repeat = bottom = "\u2016";
+    } else if (delim === "\\downarrow") {
+        top = repeat = "\u23d0";
+    } else if (delim === "\\Downarrow") {
+        top = repeat = "\u2016";
+    } else if (delim === "\\updownarrow") {
+        top = "\\uparrow";
+        repeat = "\u23d0";
+        bottom = "\\downarrow";
+    } else if (delim === "\\Updownarrow") {
+        top = "\\Uparrow";
+        repeat = "\u2016";
+        bottom = "\\Downarrow";
+    } else if (delim === "[" || delim === "\\lbrack") {
+        top = "\u23a1";
+        repeat = "\u23a2";
+        bottom = "\u23a3";
+        font = "Size4-Regular";
+    } else if (delim === "]" || delim === "\\rbrack") {
+        top = "\u23a4";
+        repeat = "\u23a5";
+        bottom = "\u23a6";
+        font = "Size4-Regular";
+    } else if (delim === "\\lfloor") {
+        repeat = top = "\u23a2";
+        bottom = "\u23a3";
+        font = "Size4-Regular";
+    } else if (delim === "\\lceil") {
+        top = "\u23a1";
+        repeat = bottom = "\u23a2";
+        font = "Size4-Regular";
+    } else if (delim === "\\rfloor") {
+        repeat = top = "\u23a5";
+        bottom = "\u23a6";
+        font = "Size4-Regular";
+    } else if (delim === "\\rceil") {
+        top = "\u23a4";
+        repeat = bottom = "\u23a5";
+        font = "Size4-Regular";
+    } else if (delim === "(") {
+        top = "\u239b";
+        repeat = "\u239c";
+        bottom = "\u239d";
+        font = "Size4-Regular";
+    } else if (delim === ")") {
+        top = "\u239e";
+        repeat = "\u239f";
+        bottom = "\u23a0";
+        font = "Size4-Regular";
+    } else if (delim === "\\{" || delim === "\\lbrace") {
+        top = "\u23a7";
+        middle = "\u23a8";
+        bottom = "\u23a9";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\}" || delim === "\\rbrace") {
+        top = "\u23ab";
+        middle = "\u23ac";
+        bottom = "\u23ad";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\lgroup") {
+        top = "\u23a7";
+        bottom = "\u23a9";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\rgroup") {
+        top = "\u23ab";
+        bottom = "\u23ad";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\lmoustache") {
+        top = "\u23a7";
+        bottom = "\u23ad";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\rmoustache") {
+        top = "\u23ab";
+        bottom = "\u23a9";
+        repeat = "\u23aa";
+        font = "Size4-Regular";
+    } else if (delim === "\\surd") {
+        top = "\ue001";
+        bottom = "\u23b7";
+        repeat = "\ue000";
+        font = "Size4-Regular";
+    }
+
+    // Get the metrics of the four sections
+    var topMetrics = getMetrics(top, font);
+    var topHeightTotal = topMetrics.height + topMetrics.depth;
+    var repeatMetrics = getMetrics(repeat, font);
+    var repeatHeightTotal = repeatMetrics.height + repeatMetrics.depth;
+    var bottomMetrics = getMetrics(bottom, font);
+    var bottomHeightTotal = bottomMetrics.height + bottomMetrics.depth;
+    var middleHeightTotal = 0;
+    var middleFactor = 1;
+    if (middle !== null) {
+        var middleMetrics = getMetrics(middle, font);
+        middleHeightTotal = middleMetrics.height + middleMetrics.depth;
+        middleFactor = 2; // repeat symmetrically above and below middle
+    }
+
+    // Calcuate the minimal height that the delimiter can have.
+    // It is at least the size of the top, bottom, and optional middle combined.
+    var minHeight = topHeightTotal + bottomHeightTotal + middleHeightTotal;
+
+    // Compute the number of copies of the repeat symbol we will need
+    var repeatCount = Math.ceil(
+        (heightTotal - minHeight) / (middleFactor * repeatHeightTotal));
+
+    // Compute the total height of the delimiter including all the symbols
+    var realHeightTotal =
+        minHeight + repeatCount * middleFactor * repeatHeightTotal;
+
+    // The center of the delimiter is placed at the center of the axis. Note
+    // that in this context, "center" means that the delimiter should be
+    // centered around the axis in the current style, while normally it is
+    // centered around the axis in textstyle.
+    var axisHeight = fontMetrics.metrics.axisHeight;
+    if (center) {
+        axisHeight *= options.style.sizeMultiplier;
+    }
+    // Calculate the depth
+    var depth = realHeightTotal / 2 - axisHeight;
+
+    // Now, we start building the pieces that will go into the vlist
+
+    // Keep a list of the inner pieces
+    var inners = [];
+
+    // Add the bottom symbol
+    inners.push(makeInner(bottom, font, mode));
+
+    var i;
+    if (middle === null) {
+        // Add that many symbols
+        for (i = 0; i < repeatCount; i++) {
+            inners.push(makeInner(repeat, font, mode));
+        }
+    } else {
+        // When there is a middle bit, we need the middle part and two repeated
+        // sections
+        for (i = 0; i < repeatCount; i++) {
+            inners.push(makeInner(repeat, font, mode));
+        }
+        inners.push(makeInner(middle, font, mode));
+        for (i = 0; i < repeatCount; i++) {
+            inners.push(makeInner(repeat, font, mode));
+        }
+    }
+
+    // Add the top symbol
+    inners.push(makeInner(top, font, mode));
+
+    // Finally, build the vlist
+    var inner = buildCommon.makeVList(inners, "bottom", depth, options);
+
+    return styleWrap(
+        makeSpan(["delimsizing", "mult"], [inner], options.getColor()),
+        Style.TEXT, options);
+};
+
+// There are three kinds of delimiters, delimiters that stack when they become
+// too large
+var stackLargeDelimiters = [
+    "(", ")", "[", "\\lbrack", "]", "\\rbrack",
+    "\\{", "\\lbrace", "\\}", "\\rbrace",
+    "\\lfloor", "\\rfloor", "\\lceil", "\\rceil",
+    "\\surd"
+];
+
+// delimiters that always stack
+var stackAlwaysDelimiters = [
+    "\\uparrow", "\\downarrow", "\\updownarrow",
+    "\\Uparrow", "\\Downarrow", "\\Updownarrow",
+    "|", "\\|", "\\vert", "\\Vert",
+    "\\lvert", "\\rvert", "\\lVert", "\\rVert",
+    "\\lgroup", "\\rgroup", "\\lmoustache", "\\rmoustache"
+];
+
+// and delimiters that never stack
+var stackNeverDelimiters = [
+    "<", ">", "\\langle", "\\rangle", "/", "\\backslash"
+];
+
+// Metrics of the different sizes. Found by looking at TeX's output of
+// $\bigl| // \Bigl| \biggl| \Biggl| \showlists$
+// Used to create stacked delimiters of appropriate sizes in makeSizedDelim.
+var sizeToMaxHeight = [0, 1.2, 1.8, 2.4, 3.0];
+
+/**
+ * Used to create a delimiter of a specific size, where `size` is 1, 2, 3, or 4.
+ */
+var makeSizedDelim = function(delim, size, options, mode) {
+    // < and > turn into \langle and \rangle in delimiters
+    if (delim === "<") {
+        delim = "\\langle";
+    } else if (delim === ">") {
+        delim = "\\rangle";
+    }
+
+    // Sized delimiters are never centered.
+    if (utils.contains(stackLargeDelimiters, delim) ||
+        utils.contains(stackNeverDelimiters, delim)) {
+        return makeLargeDelim(delim, size, false, options, mode);
+    } else if (utils.contains(stackAlwaysDelimiters, delim)) {
+        return makeStackedDelim(
+            delim, sizeToMaxHeight[size], false, options, mode);
+    } else {
+        throw new ParseError("Illegal delimiter: '" + delim + "'");
+    }
+};
+
+/**
+ * There are three different sequences of delimiter sizes that the delimiters
+ * follow depending on the kind of delimiter. This is used when creating custom
+ * sized delimiters to decide whether to create a small, large, or stacked
+ * delimiter.
+ *
+ * In real TeX, these sequences aren't explicitly defined, but are instead
+ * defined inside the font metrics. Since there are only three sequences that
+ * are possible for the delimiters that TeX defines, it is easier to just encode
+ * them explicitly here.
+ */
+
+// Delimiters that never stack try small delimiters and large delimiters only
+var stackNeverDelimiterSequence = [
+    {type: "small", style: Style.SCRIPTSCRIPT},
+    {type: "small", style: Style.SCRIPT},
+    {type: "small", style: Style.TEXT},
+    {type: "large", size: 1},
+    {type: "large", size: 2},
+    {type: "large", size: 3},
+    {type: "large", size: 4}
+];
+
+// Delimiters that always stack try the small delimiters first, then stack
+var stackAlwaysDelimiterSequence = [
+    {type: "small", style: Style.SCRIPTSCRIPT},
+    {type: "small", style: Style.SCRIPT},
+    {type: "small", style: Style.TEXT},
+    {type: "stack"}
+];
+
+// Delimiters that stack when large try the small and then large delimiters, and
+// stack afterwards
+var stackLargeDelimiterSequence = [
+    {type: "small", style: Style.SCRIPTSCRIPT},
+    {type: "small", style: Style.SCRIPT},
+    {type: "small", style: Style.TEXT},
+    {type: "large", size: 1},
+    {type: "large", size: 2},
+    {type: "large", size: 3},
+    {type: "large", size: 4},
+    {type: "stack"}
+];
+
+/**
+ * Get the font used in a delimiter based on what kind of delimiter it is.
+ */
+var delimTypeToFont = function(type) {
+    if (type.type === "small") {
+        return "Main-Regular";
+    } else if (type.type === "large") {
+        return "Size" + type.size + "-Regular";
+    } else if (type.type === "stack") {
+        return "Size4-Regular";
+    }
+};
+
+/**
+ * Traverse a sequence of types of delimiters to decide what kind of delimiter
+ * should be used to create a delimiter of the given height+depth.
+ */
+var traverseSequence = function(delim, height, sequence, options) {
+    // Here, we choose the index we should start at in the sequences. In smaller
+    // sizes (which correspond to larger numbers in style.size) we start earlier
+    // in the sequence. Thus, scriptscript starts at index 3-3=0, script starts
+    // at index 3-2=1, text starts at 3-1=2, and display starts at min(2,3-0)=2
+    var start = Math.min(2, 3 - options.style.size);
+    for (var i = start; i < sequence.length; i++) {
+        if (sequence[i].type === "stack") {
+            // This is always the last delimiter, so we just break the loop now.
+            break;
+        }
+
+        var metrics = getMetrics(delim, delimTypeToFont(sequence[i]));
+        var heightDepth = metrics.height + metrics.depth;
+
+        // Small delimiters are scaled down versions of the same font, so we
+        // account for the style change size.
+
+        if (sequence[i].type === "small") {
+            heightDepth *= sequence[i].style.sizeMultiplier;
+        }
+
+        // Check if the delimiter at this size works for the given height.
+        if (heightDepth > height) {
+            return sequence[i];
+        }
+    }
+
+    // If we reached the end of the sequence, return the last sequence element.
+    return sequence[sequence.length - 1];
+};
+
+/**
+ * Make a delimiter of a given height+depth, with optional centering. Here, we
+ * traverse the sequences, and create a delimiter that the sequence tells us to.
+ */
+var makeCustomSizedDelim = function(delim, height, center, options, mode) {
+    if (delim === "<") {
+        delim = "\\langle";
+    } else if (delim === ">") {
+        delim = "\\rangle";
+    }
+
+    // Decide what sequence to use
+    var sequence;
+    if (utils.contains(stackNeverDelimiters, delim)) {
+        sequence = stackNeverDelimiterSequence;
+    } else if (utils.contains(stackLargeDelimiters, delim)) {
+        sequence = stackLargeDelimiterSequence;
+    } else {
+        sequence = stackAlwaysDelimiterSequence;
+    }
+
+    // Look through the sequence
+    var delimType = traverseSequence(delim, height, sequence, options);
+
+    // Depending on the sequence element we decided on, call the appropriate
+    // function.
+    if (delimType.type === "small") {
+        return makeSmallDelim(delim, delimType.style, center, options, mode);
+    } else if (delimType.type === "large") {
+        return makeLargeDelim(delim, delimType.size, center, options, mode);
+    } else if (delimType.type === "stack") {
+        return makeStackedDelim(delim, height, center, options, mode);
+    }
+};
+
+/**
+ * Make a delimiter for use with `\left` and `\right`, given a height and depth
+ * of an expression that the delimiters surround.
+ */
+var makeLeftRightDelim = function(delim, height, depth, options, mode) {
+    // We always center \left/\right delimiters, so the axis is always shifted
+    var axisHeight =
+        fontMetrics.metrics.axisHeight * options.style.sizeMultiplier;
+
+    // Taken from TeX source, tex.web, function make_left_right
+    var delimiterFactor = 901;
+    var delimiterExtend = 5.0 / fontMetrics.metrics.ptPerEm;
+
+    var maxDistFromAxis = Math.max(
+        height - axisHeight, depth + axisHeight);
+
+    var totalHeight = Math.max(
+        // In real TeX, calculations are done using integral values which are
+        // 65536 per pt, or 655360 per em. So, the division here truncates in
+        // TeX but doesn't here, producing different results. If we wanted to
+        // exactly match TeX's calculation, we could do
+        //   Math.floor(655360 * maxDistFromAxis / 500) *
+        //    delimiterFactor / 655360
+        // (To see the difference, compare
+        //    x^{x^{\left(\rule{0.1em}{0.68em}\right)}}
+        // in TeX and KaTeX)
+        maxDistFromAxis / 500 * delimiterFactor,
+        2 * maxDistFromAxis - delimiterExtend);
+
+    // Finally, we defer to `makeCustomSizedDelim` with our calculated total
+    // height
+    return makeCustomSizedDelim(delim, totalHeight, true, options, mode);
+};
+
+module.exports = {
+    sizedDelim: makeSizedDelim,
+    customSizedDelim: makeCustomSizedDelim,
+    leftRightDelim: makeLeftRightDelim
+};
+
+},{"./ParseError":7,"./Style":10,"./buildCommon":11,"./fontMetrics":18,"./symbols":24,"./utils":25}],16:[function(require,module,exports){
+/**
+ * These objects store the data about the DOM nodes we create, as well as some
+ * extra data. They can then be transformed into real DOM nodes with the
+ * `toNode` function or HTML markup using `toMarkup`. They are useful for both
+ * storing extra properties on the nodes, as well as providing a way to easily
+ * work with the DOM.
+ *
+ * Similar functions for working with MathML nodes exist in mathMLTree.js.
+ */
+
+var utils = require("./utils");
+
+/**
+ * Create an HTML className based on a list of classes. In addition to joining
+ * with spaces, we also remove null or empty classes.
+ */
+var createClass = function(classes) {
+    classes = classes.slice();
+    for (var i = classes.length - 1; i >= 0; i--) {
+        if (!classes[i]) {
+            classes.splice(i, 1);
+        }
+    }
+
+    return classes.join(" ");
+};
+
+/**
+ * This node represents a span node, with a className, a list of children, and
+ * an inline style. It also contains information about its height, depth, and
+ * maxFontSize.
+ */
+function span(classes, children, height, depth, maxFontSize, style) {
+    this.classes = classes || [];
+    this.children = children || [];
+    this.height = height || 0;
+    this.depth = depth || 0;
+    this.maxFontSize = maxFontSize || 0;
+    this.style = style || {};
+    this.attributes = {};
+}
+
+/**
+ * Sets an arbitrary attribute on the span. Warning: use this wisely. Not all
+ * browsers support attributes the same, and having too many custom attributes
+ * is probably bad.
+ */
+span.prototype.setAttribute = function(attribute, value) {
+    this.attributes[attribute] = value;
+};
+
+/**
+ * Convert the span into an HTML node
+ */
+span.prototype.toNode = function() {
+    var span = document.createElement("span");
+
+    // Apply the class
+    span.className = createClass(this.classes);
+
+    // Apply inline styles
+    for (var style in this.style) {
+        if (Object.prototype.hasOwnProperty.call(this.style, style)) {
+            span.style[style] = this.style[style];
+        }
+    }
+
+    // Apply attributes
+    for (var attr in this.attributes) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+            span.setAttribute(attr, this.attributes[attr]);
+        }
+    }
+
+    // Append the children, also as HTML nodes
+    for (var i = 0; i < this.children.length; i++) {
+        span.appendChild(this.children[i].toNode());
+    }
+
+    return span;
+};
+
+/**
+ * Convert the span into an HTML markup string
+ */
+span.prototype.toMarkup = function() {
+    var markup = "<span";
+
+    // Add the class
+    if (this.classes.length) {
+        markup += " class=\"";
+        markup += utils.escape(createClass(this.classes));
+        markup += "\"";
+    }
+
+    var styles = "";
+
+    // Add the styles, after hyphenation
+    for (var style in this.style) {
+        if (this.style.hasOwnProperty(style)) {
+            styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
+        }
+    }
+
+    if (styles) {
+        markup += " style=\"" + utils.escape(styles) + "\"";
+    }
+
+    // Add the attributes
+    for (var attr in this.attributes) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+            markup += " " + attr + "=\"";
+            markup += utils.escape(this.attributes[attr]);
+            markup += "\"";
+        }
+    }
+
+    markup += ">";
+
+    // Add the markup of the children, also as markup
+    for (var i = 0; i < this.children.length; i++) {
+        markup += this.children[i].toMarkup();
+    }
+
+    markup += "</span>";
+
+    return markup;
+};
+
+/**
+ * This node represents a document fragment, which contains elements, but when
+ * placed into the DOM doesn't have any representation itself. Thus, it only
+ * contains children and doesn't have any HTML properties. It also keeps track
+ * of a height, depth, and maxFontSize.
+ */
+function documentFragment(children, height, depth, maxFontSize) {
+    this.children = children || [];
+    this.height = height || 0;
+    this.depth = depth || 0;
+    this.maxFontSize = maxFontSize || 0;
+}
+
+/**
+ * Convert the fragment into a node
+ */
+documentFragment.prototype.toNode = function() {
+    // Create a fragment
+    var frag = document.createDocumentFragment();
+
+    // Append the children
+    for (var i = 0; i < this.children.length; i++) {
+        frag.appendChild(this.children[i].toNode());
+    }
+
+    return frag;
+};
+
+/**
+ * Convert the fragment into HTML markup
+ */
+documentFragment.prototype.toMarkup = function() {
+    var markup = "";
+
+    // Simply concatenate the markup for the children together
+    for (var i = 0; i < this.children.length; i++) {
+        markup += this.children[i].toMarkup();
+    }
+
+    return markup;
+};
+
+/**
+ * A symbol node contains information about a single symbol. It either renders
+ * to a single text node, or a span with a single text node in it, depending on
+ * whether it has CSS classes, styles, or needs italic correction.
+ */
+function symbolNode(value, height, depth, italic, skew, classes, style) {
+    this.value = value || "";
+    this.height = height || 0;
+    this.depth = depth || 0;
+    this.italic = italic || 0;
+    this.skew = skew || 0;
+    this.classes = classes || [];
+    this.style = style || {};
+    this.maxFontSize = 0;
+}
+
+/**
+ * Creates a text node or span from a symbol node. Note that a span is only
+ * created if it is needed.
+ */
+symbolNode.prototype.toNode = function() {
+    var node = document.createTextNode(this.value);
+    var span = null;
+
+    if (this.italic > 0) {
+        span = document.createElement("span");
+        span.style.marginRight = this.italic + "em";
+    }
+
+    if (this.classes.length > 0) {
+        span = span || document.createElement("span");
+        span.className = createClass(this.classes);
+    }
+
+    for (var style in this.style) {
+        if (this.style.hasOwnProperty(style)) {
+            span = span || document.createElement("span");
+            span.style[style] = this.style[style];
+        }
+    }
+
+    if (span) {
+        span.appendChild(node);
+        return span;
+    } else {
+        return node;
+    }
+};
+
+/**
+ * Creates markup for a symbol node.
+ */
+symbolNode.prototype.toMarkup = function() {
+    // TODO(alpert): More duplication than I'd like from
+    // span.prototype.toMarkup and symbolNode.prototype.toNode...
+    var needsSpan = false;
+
+    var markup = "<span";
+
+    if (this.classes.length) {
+        needsSpan = true;
+        markup += " class=\"";
+        markup += utils.escape(createClass(this.classes));
+        markup += "\"";
+    }
+
+    var styles = "";
+
+    if (this.italic > 0) {
+        styles += "margin-right:" + this.italic + "em;";
+    }
+    for (var style in this.style) {
+        if (this.style.hasOwnProperty(style)) {
+            styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
+        }
+    }
+
+    if (styles) {
+        needsSpan = true;
+        markup += " style=\"" + utils.escape(styles) + "\"";
+    }
+
+    var escaped = utils.escape(this.value);
+    if (needsSpan) {
+        markup += ">";
+        markup += escaped;
+        markup += "</span>";
+        return markup;
+    } else {
+        return escaped;
+    }
+};
+
+module.exports = {
+    span: span,
+    documentFragment: documentFragment,
+    symbolNode: symbolNode
+};
+
+},{"./utils":25}],17:[function(require,module,exports){
+var fontMetrics = require("./fontMetrics");
+var parseData = require("./parseData");
+var ParseError = require("./ParseError");
+
+var ParseNode = parseData.ParseNode;
+var ParseResult = parseData.ParseResult;
+
+/**
+ * Parse the body of the environment, with rows delimited by \\ and
+ * columns delimited by &, and create a nested list in row-major order
+ * with one group per cell.
+ */
+function parseArray(parser, pos, mode, result) {
+    var row = [], body = [row], rowGaps = [];
+    while (true) {
+        var cell = parser.parseExpression(pos, mode, false, null);
+        row.push(new ParseNode("ordgroup", cell.result, mode));
+        pos = cell.position;
+        var next = cell.peek.text;
+        if (next === "&") {
+            pos = cell.peek.position;
+        } else if (next === "\\end") {
+            break;
+        } else if (next === "\\\\" || next === "\\cr") {
+            var cr = parser.parseFunction(pos, mode);
+            rowGaps.push(cr.result.value.size);
+            pos = cr.position;
+            row = [];
+            body.push(row);
+        } else {
+            throw new ParseError("Expected & or \\\\ or \\end",
+                                 parser.lexer, cell.peek.position);
+        }
+    }
+    result.body = body;
+    result.rowGaps = rowGaps;
+    return new ParseResult(new ParseNode(result.type, result, mode), pos);
+}
+
+/*
+ * An environment definition is very similar to a function definition.
+ * Each element of the following array may contain
+ *  - names: The names associated with a function. This can be used to
+ *           share one implementation between several similar environments.
+ *  - numArgs: The number of arguments after the \begin{name} function.
+ *  - argTypes: (optional) Just like for a function
+ *  - allowedInText: (optional) Whether or not the environment is allowed inside
+ *                   text mode (default false) (not enforced yet)
+ *  - numOptionalArgs: (optional) Just like for a function
+ *  - handler: The function that is called to handle this environment.
+ *             It will receive the following arguments:
+ *             - pos: the current position of the parser.
+ *             - mode: the current parsing mode.
+ *             - envName: the name of the environment, one of the listed names.
+ *             - [args]: the arguments passed to \begin.
+ *             - positions: the positions associated with these arguments.
+ */
+
+var environmentDefinitions = [
+
+    // Arrays are part of LaTeX, defined in lttab.dtx so its documentation
+    // is part of the source2e.pdf file of LaTeX2e source documentation.
+    {
+        names: ["array"],
+        numArgs: 1,
+        handler: function(pos, mode, envName, colalign, positions) {
+            var parser = this;
+            colalign = colalign.value.map ? colalign.value : [colalign];
+            var cols = colalign.map(function(node) {
+                var ca = node.value;
+                if ("lcr".indexOf(ca) !== -1) {
+                    return {
+                        type: "align",
+                        align: ca
+                    };
+                } else if (ca === "|") {
+                    return {
+                        type: "separator",
+                        separator: "|"
+                    };
+                }
+                throw new ParseError(
+                    "Unknown column alignment: " + node.value,
+                    parser.lexer, positions[1]);
+            });
+            var res = {
+                type: "array",
+                cols: cols,
+                hskipBeforeAndAfter: true // \@preamble in lttab.dtx
+            };
+            res = parseArray(parser, pos, mode, res);
+            return res;
+        }
+    },
+
+    // The matrix environments of amsmath builds on the array environment
+    // of LaTeX, which is discussed above.
+    {
+        names: [
+            "matrix",
+            "pmatrix",
+            "bmatrix",
+            "Bmatrix",
+            "vmatrix",
+            "Vmatrix"
+        ],
+        handler: function(pos, mode, envName) {
+            var delimiters = {
+                "matrix": null,
+                "pmatrix": ["(", ")"],
+                "bmatrix": ["[", "]"],
+                "Bmatrix": ["\\{", "\\}"],
+                "vmatrix": ["|", "|"],
+                "Vmatrix": ["\\Vert", "\\Vert"]
+            }[envName];
+            var res = {
+                type: "array",
+                hskipBeforeAndAfter: false // \hskip -\arraycolsep in amsmath
+            };
+            res = parseArray(this, pos, mode, res);
+            if (delimiters) {
+                res.result = new ParseNode("leftright", {
+                    body: [res.result],
+                    left: delimiters[0],
+                    right: delimiters[1]
+                }, mode);
+            }
+            return res;
+        }
+    },
+
+    // A cases environment (in amsmath.sty) is almost equivalent to
+    // \def\arraystretch{1.2}%
+    // \left\{\begin{array}{@{}l@{\quad}l@{}} … \end{array}\right.
+    {
+        names: ["cases"],
+        handler: function(pos, mode, envName) {
+            var res = {
+                type: "array",
+                arraystretch: 1.2,
+                cols: [{
+                    type: "align",
+                    align: "l",
+                    pregap: 0,
+                    postgap: fontMetrics.metrics.quad
+                }, {
+                    type: "align",
+                    align: "l",
+                    pregap: 0,
+                    postgap: 0
+                }]
+            };
+            res = parseArray(this, pos, mode, res);
+            res.result = new ParseNode("leftright", {
+                body: [res.result],
+                left: "\\{",
+                right: "."
+            }, mode);
+            return res;
+        }
+    }
+];
+
+module.exports = (function() {
+    // nested function so we don't leak i and j into the module scope
+    var exports = {};
+    for (var i = 0; i < environmentDefinitions.length; ++i) {
+        var def = environmentDefinitions[i];
+        def.greediness = 1;
+        def.allowedInText = !!def.allowedInText;
+        def.numArgs = def.numArgs || 0;
+        def.numOptionalArgs = def.numOptionalArgs || 0;
+        for (var j = 0; j < def.names.length; ++j) {
+            exports[def.names[j]] = def;
+        }
+    }
+    return exports;
+})();
+
+},{"./ParseError":7,"./fontMetrics":18,"./parseData":22}],18:[function(require,module,exports){
+/* jshint unused:false */
+
+var Style = require("./Style");
+
+/**
+ * This file contains metrics regarding fonts and individual symbols. The sigma
+ * and xi variables, as well as the metricMap map contain data extracted from
+ * TeX, TeX font metrics, and the TTF files. These data are then exposed via the
+ * `metrics` variable and the getCharacterMetrics function.
+ */
+
+// These font metrics are extracted from TeX by using
+// \font\a=cmmi10
+// \showthe\fontdimenX\a
+// where X is the corresponding variable number. These correspond to the font
+// parameters of the symbol fonts. In TeX, there are actually three sets of
+// dimensions, one for each of textstyle, scriptstyle, and scriptscriptstyle,
+// but we only use the textstyle ones, and scale certain dimensions accordingly.
+// See the TeXbook, page 441.
+var sigma1 = 0.025;
+var sigma2 = 0;
+var sigma3 = 0;
+var sigma4 = 0;
+var sigma5 = 0.431;
+var sigma6 = 1;
+var sigma7 = 0;
+var sigma8 = 0.677;
+var sigma9 = 0.394;
+var sigma10 = 0.444;
+var sigma11 = 0.686;
+var sigma12 = 0.345;
+var sigma13 = 0.413;
+var sigma14 = 0.363;
+var sigma15 = 0.289;
+var sigma16 = 0.150;
+var sigma17 = 0.247;
+var sigma18 = 0.386;
+var sigma19 = 0.050;
+var sigma20 = 2.390;
+var sigma21 = 1.01;
+var sigma21Script = 0.81;
+var sigma21ScriptScript = 0.71;
+var sigma22 = 0.250;
+
+// These font metrics are extracted from TeX by using
+// \font\a=cmex10
+// \showthe\fontdimenX\a
+// where X is the corresponding variable number. These correspond to the font
+// parameters of the extension fonts (family 3). See the TeXbook, page 441.
+var xi1 = 0;
+var xi2 = 0;
+var xi3 = 0;
+var xi4 = 0;
+var xi5 = 0.431;
+var xi6 = 1;
+var xi7 = 0;
+var xi8 = 0.04;
+var xi9 = 0.111;
+var xi10 = 0.166;
+var xi11 = 0.2;
+var xi12 = 0.6;
+var xi13 = 0.1;
+
+// This value determines how large a pt is, for metrics which are defined in
+// terms of pts.
+// This value is also used in katex.less; if you change it make sure the values
+// match.
+var ptPerEm = 10.0;
+
+// The space between adjacent `|` columns in an array definition. From
+// `\showthe\doublerulesep` in LaTeX.
+var doubleRuleSep = 2.0 / ptPerEm;
+
+/**
+ * This is just a mapping from common names to real metrics
+ */
+var metrics = {
+    xHeight: sigma5,
+    quad: sigma6,
+    num1: sigma8,
+    num2: sigma9,
+    num3: sigma10,
+    denom1: sigma11,
+    denom2: sigma12,
+    sup1: sigma13,
+    sup2: sigma14,
+    sup3: sigma15,
+    sub1: sigma16,
+    sub2: sigma17,
+    supDrop: sigma18,
+    subDrop: sigma19,
+    axisHeight: sigma22,
+    defaultRuleThickness: xi8,
+    bigOpSpacing1: xi9,
+    bigOpSpacing2: xi10,
+    bigOpSpacing3: xi11,
+    bigOpSpacing4: xi12,
+    bigOpSpacing5: xi13,
+    ptPerEm: ptPerEm,
+    emPerEx: sigma5 / sigma6,
+    doubleRuleSep: doubleRuleSep,
+
+    // TODO(alpert): Missing parallel structure here. We should probably add
+    // style-specific metrics for all of these.
+    delim1: sigma20,
+    getDelim2: function(style) {
+        if (style.size === Style.TEXT.size) {
+            return sigma21;
+        } else if (style.size === Style.SCRIPT.size) {
+            return sigma21Script;
+        } else if (style.size === Style.SCRIPTSCRIPT.size) {
+            return sigma21ScriptScript;
+        }
+        throw new Error("Unexpected style size: " + style.size);
+    }
+};
+
+// This map contains a mapping from font name and character code to character
+// metrics, including height, depth, italic correction, and skew (kern from the
+// character to the corresponding \skewchar)
+// This map is generated via `make metrics`. It should not be changed manually.
+var metricMap = require("./fontMetricsData");
+
+/**
+ * This function is a convience function for looking up information in the
+ * metricMap table. It takes a character as a string, and a style
+ */
+var getCharacterMetrics = function(character, style) {
+    return metricMap[style][character.charCodeAt(0)];
+};
+
+module.exports = {
+    metrics: metrics,
+    getCharacterMetrics: getCharacterMetrics
+};
+
+},{"./Style":10,"./fontMetricsData":19}],19:[function(require,module,exports){
+module.exports = {
+"AMS-Regular": {
+  "65": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "66": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "67": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "68": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "69": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "70": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "71": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "72": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "73": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "74": {"depth": 0.16667, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "75": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "76": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "77": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "78": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "79": {"depth": 0.16667, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "80": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "81": {"depth": 0.16667, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "82": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "83": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "84": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "85": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "86": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "87": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "88": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "89": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "90": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "107": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "165": {"depth": 0.0, "height": 0.675, "italic": 0.025, "skew": 0.0},
+  "174": {"depth": 0.15559, "height": 0.69224, "italic": 0.0, "skew": 0.0},
+  "240": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "295": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "710": {"depth": 0.0, "height": 0.825, "italic": 0.0, "skew": 0.0},
+  "732": {"depth": 0.0, "height": 0.9, "italic": 0.0, "skew": 0.0},
+  "770": {"depth": 0.0, "height": 0.825, "italic": 0.0, "skew": 0.0},
+  "771": {"depth": 0.0, "height": 0.9, "italic": 0.0, "skew": 0.0},
+  "989": {"depth": 0.08167, "height": 0.58167, "italic": 0.0, "skew": 0.0},
+  "1008": {"depth": 0.0, "height": 0.43056, "italic": 0.04028, "skew": 0.0},
+  "8245": {"depth": 0.0, "height": 0.54986, "italic": 0.0, "skew": 0.0},
+  "8463": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8487": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8498": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8502": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8503": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8504": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8513": {"depth": 0.0, "height": 0.68889, "italic": 0.0, "skew": 0.0},
+  "8592": {"depth": -0.03598, "height": 0.46402, "italic": 0.0, "skew": 0.0},
+  "8594": {"depth": -0.03598, "height": 0.46402, "italic": 0.0, "skew": 0.0},
+  "8602": {"depth": -0.13313, "height": 0.36687, "italic": 0.0, "skew": 0.0},
+  "8603": {"depth": -0.13313, "height": 0.36687, "italic": 0.0, "skew": 0.0},
+  "8606": {"depth": 0.01354, "height": 0.52239, "italic": 0.0, "skew": 0.0},
+  "8608": {"depth": 0.01354, "height": 0.52239, "italic": 0.0, "skew": 0.0},
+  "8610": {"depth": 0.01354, "height": 0.52239, "italic": 0.0, "skew": 0.0},
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+  "931": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "933": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "934": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "936": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "937": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "2018": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "2019": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0},
+  "8242": {"depth": 0.0, "height": 0.61111, "italic": 0.0, "skew": 0.0}
+}};
+
+},{}],20:[function(require,module,exports){
+var utils = require("./utils");
+var ParseError = require("./ParseError");
+
+// This file contains a list of functions that we parse. The functions map
+// contains the following data:
+
+/*
+ * Keys are the name of the functions to parse
+ * The data contains the following keys:
+ *  - numArgs: The number of arguments the function takes.
+ *  - argTypes: (optional) An array corresponding to each argument of the
+ *              function, giving the type of argument that should be parsed. Its
+ *              length should be equal to `numArgs + numOptionalArgs`. Valid
+ *              types:
+ *               - "size": A size-like thing, such as "1em" or "5ex"
+ *               - "color": An html color, like "#abc" or "blue"
+ *               - "original": The same type as the environment that the
+ *                             function being parsed is in (e.g. used for the
+ *                             bodies of functions like \color where the first
+ *                             argument is special and the second argument is
+ *                             parsed normally)
+ *              Other possible types (probably shouldn't be used)
+ *               - "text": Text-like (e.g. \text)
+ *               - "math": Normal math
+ *              If undefined, this will be treated as an appropriate length
+ *              array of "original" strings
+ *  - greediness: (optional) The greediness of the function to use ungrouped
+ *                arguments.
+ *
+ *                E.g. if you have an expression
+ *                  \sqrt \frac 1 2
+ *                since \frac has greediness=2 vs \sqrt's greediness=1, \frac
+ *                will use the two arguments '1' and '2' as its two arguments,
+ *                then that whole function will be used as the argument to
+ *                \sqrt. On the other hand, the expressions
+ *                  \frac \frac 1 2 3
+ *                and
+ *                  \frac \sqrt 1 2
+ *                will fail because \frac and \frac have equal greediness
+ *                and \sqrt has a lower greediness than \frac respectively. To
+ *                make these parse, we would have to change them to:
+ *                  \frac {\frac 1 2} 3
+ *                and
+ *                  \frac {\sqrt 1} 2
+ *
+ *                The default value is `1`
+ *  - allowedInText: (optional) Whether or not the function is allowed inside
+ *                   text mode (default false)
+ *  - numOptionalArgs: (optional) The number of optional arguments the function
+ *                     should parse. If the optional arguments aren't found,
+ *                     `null` will be passed to the handler in their place.
+ *                     (default 0)
+ *  - handler: The function that is called to handle this function and its
+ *             arguments. The arguments are:
+ *              - func: the text of the function
+ *              - [args]: the next arguments are the arguments to the function,
+ *                        of which there are numArgs of them
+ *              - positions: the positions in the overall string of the function
+ *                           and the arguments. Should only be used to produce
+ *                           error messages
+ *             The function should return an object with the following keys:
+ *              - type: The type of element that this is. This is then used in
+ *                      buildHTML/buildMathML to determine which function
+ *                      should be called to build this node into a DOM node
+ *             Any other data can be added to the object, which will be passed
+ *             in to the function in buildHTML/buildMathML as `group.value`.
+ */
+
+var functions = {
+    // A normal square root
+    "\\sqrt": {
+        numArgs: 1,
+        numOptionalArgs: 1,
+        handler: function(func, index, body, positions) {
+            return {
+                type: "sqrt",
+                body: body,
+                index: index
+            };
+        }
+    },
+
+    // Some non-mathy text
+    "\\text": {
+        numArgs: 1,
+        argTypes: ["text"],
+        greediness: 2,
+        handler: function(func, body) {
+            // Since the corresponding buildHTML/buildMathML function expects a
+            // list of elements, we normalize for different kinds of arguments
+            // TODO(emily): maybe this should be done somewhere else
+            var inner;
+            if (body.type === "ordgroup") {
+                inner = body.value;
+            } else {
+                inner = [body];
+            }
+
+            return {
+                type: "text",
+                body: inner
+            };
+        }
+    },
+
+    // A two-argument custom color
+    "\\color": {
+        numArgs: 2,
+        allowedInText: true,
+        greediness: 3,
+        argTypes: ["color", "original"],
+        handler: function(func, color, body) {
+            // Normalize the different kinds of bodies (see \text above)
+            var inner;
+            if (body.type === "ordgroup") {
+                inner = body.value;
+            } else {
+                inner = [body];
+            }
+
+            return {
+                type: "color",
+                color: color.value,
+                value: inner
+            };
+        }
+    },
+
+    // An overline
+    "\\overline": {
+        numArgs: 1,
+        handler: function(func, body) {
+            return {
+                type: "overline",
+                body: body
+            };
+        }
+    },
+
+    // A box of the width and height
+    "\\rule": {
+        numArgs: 2,
+        numOptionalArgs: 1,
+        argTypes: ["size", "size", "size"],
+        handler: function(func, shift, width, height) {
+            return {
+                type: "rule",
+                shift: shift && shift.value,
+                width: width.value,
+                height: height.value
+            };
+        }
+    },
+
+    // A KaTeX logo
+    "\\KaTeX": {
+        numArgs: 0,
+        handler: function(func) {
+            return {
+                type: "katex"
+            };
+        }
+    },
+
+    "\\phantom": {
+        numArgs: 1,
+        handler: function(func, body) {
+            var inner;
+            if (body.type === "ordgroup") {
+                inner = body.value;
+            } else {
+                inner = [body];
+            }
+
+            return {
+                type: "phantom",
+                value: inner
+            };
+        }
+    }
+};
+
+// Extra data needed for the delimiter handler down below
+var delimiterSizes = {
+    "\\bigl" : {type: "open",    size: 1},
+    "\\Bigl" : {type: "open",    size: 2},
+    "\\biggl": {type: "open",    size: 3},
+    "\\Biggl": {type: "open",    size: 4},
+    "\\bigr" : {type: "close",   size: 1},
+    "\\Bigr" : {type: "close",   size: 2},
+    "\\biggr": {type: "close",   size: 3},
+    "\\Biggr": {type: "close",   size: 4},
+    "\\bigm" : {type: "rel",     size: 1},
+    "\\Bigm" : {type: "rel",     size: 2},
+    "\\biggm": {type: "rel",     size: 3},
+    "\\Biggm": {type: "rel",     size: 4},
+    "\\big"  : {type: "textord", size: 1},
+    "\\Big"  : {type: "textord", size: 2},
+    "\\bigg" : {type: "textord", size: 3},
+    "\\Bigg" : {type: "textord", size: 4}
+};
+
+var delimiters = [
+    "(", ")", "[", "\\lbrack", "]", "\\rbrack",
+    "\\{", "\\lbrace", "\\}", "\\rbrace",
+    "\\lfloor", "\\rfloor", "\\lceil", "\\rceil",
+    "<", ">", "\\langle", "\\rangle",
+    "\\lvert", "\\rvert", "\\lVert", "\\rVert",
+    "\\lgroup", "\\rgroup", "\\lmoustache", "\\rmoustache",
+    "/", "\\backslash",
+    "|", "\\vert", "\\|", "\\Vert",
+    "\\uparrow", "\\Uparrow",
+    "\\downarrow", "\\Downarrow",
+    "\\updownarrow", "\\Updownarrow",
+    "."
+];
+
+var fontAliases = {
+    "\\Bbb": "\\mathbb",
+    "\\bold": "\\mathbf",
+    "\\frak": "\\mathfrak"
+};
+
+/*
+ * This is a list of functions which each have the same function but have
+ * different names so that we don't have to duplicate the data a bunch of times.
+ * Each element in the list is an object with the following keys:
+ *  - funcs: A list of function names to be associated with the data
+ *  - data: An objecty with the same data as in each value of the `function`
+ *          table above
+ */
+var duplicatedFunctions = [
+    // Single-argument color functions
+    {
+        funcs: [
+            "\\blue", "\\orange", "\\pink", "\\red",
+            "\\green", "\\gray", "\\purple",
+            "\\blueA", "\\blueB", "\\blueC", "\\blueD", "\\blueE",
+            "\\tealA", "\\tealB", "\\tealC", "\\tealD", "\\tealE",
+            "\\greenA", "\\greenB", "\\greenC", "\\greenD", "\\greenE",
+            "\\goldA", "\\goldB", "\\goldC", "\\goldD", "\\goldE",
+            "\\redA", "\\redB", "\\redC", "\\redD", "\\redE",
+            "\\maroonA", "\\maroonB", "\\maroonC", "\\maroonD", "\\maroonE",
+            "\\purpleA", "\\purpleB", "\\purpleC", "\\purpleD", "\\purpleE",
+            "\\mintA", "\\mintB", "\\mintC",
+            "\\grayA", "\\grayB", "\\grayC", "\\grayD", "\\grayE",
+            "\\grayF", "\\grayG", "\\grayH", "\\grayI",
+            "\\kaBlue", "\\kaGreen"
+        ],
+        data: {
+            numArgs: 1,
+            allowedInText: true,
+            greediness: 3,
+            handler: function(func, body) {
+                var atoms;
+                if (body.type === "ordgroup") {
+                    atoms = body.value;
+                } else {
+                    atoms = [body];
+                }
+
+                return {
+                    type: "color",
+                    color: "katex-" + func.slice(1),
+                    value: atoms
+                };
+            }
+        }
+    },
+
+    // There are 2 flags for operators; whether they produce limits in
+    // displaystyle, and whether they are symbols and should grow in
+    // displaystyle. These four groups cover the four possible choices.
+
+    // No limits, not symbols
+    {
+        funcs: [
+            "\\arcsin", "\\arccos", "\\arctan", "\\arg", "\\cos", "\\cosh",
+            "\\cot", "\\coth", "\\csc", "\\deg", "\\dim", "\\exp", "\\hom",
+            "\\ker", "\\lg", "\\ln", "\\log", "\\sec", "\\sin", "\\sinh",
+            "\\tan","\\tanh"
+        ],
+        data: {
+            numArgs: 0,
+            handler: function(func) {
+                return {
+                    type: "op",
+                    limits: false,
+                    symbol: false,
+                    body: func
+                };
+            }
+        }
+    },
+
+    // Limits, not symbols
+    {
+        funcs: [
+            "\\det", "\\gcd", "\\inf", "\\lim", "\\liminf", "\\limsup", "\\max",
+            "\\min", "\\Pr", "\\sup"
+        ],
+        data: {
+            numArgs: 0,
+            handler: function(func) {
+                return {
+                    type: "op",
+                    limits: true,
+                    symbol: false,
+                    body: func
+                };
+            }
+        }
+    },
+
+    // No limits, symbols
+    {
+        funcs: [
+            "\\int", "\\iint", "\\iiint", "\\oint"
+        ],
+        data: {
+            numArgs: 0,
+            handler: function(func) {
+                return {
+                    type: "op",
+                    limits: false,
+                    symbol: true,
+                    body: func
+                };
+            }
+        }
+    },
+
+    // Limits, symbols
+    {
+        funcs: [
+            "\\coprod", "\\bigvee", "\\bigwedge", "\\biguplus", "\\bigcap",
+            "\\bigcup", "\\intop", "\\prod", "\\sum", "\\bigotimes",
+            "\\bigoplus", "\\bigodot", "\\bigsqcup", "\\smallint"
+        ],
+        data: {
+            numArgs: 0,
+            handler: function(func) {
+                return {
+                    type: "op",
+                    limits: true,
+                    symbol: true,
+                    body: func
+                };
+            }
+        }
+    },
+
+    // Fractions
+    {
+        funcs: [
+            "\\dfrac", "\\frac", "\\tfrac",
+            "\\dbinom", "\\binom", "\\tbinom"
+        ],
+        data: {
+            numArgs: 2,
+            greediness: 2,
+            handler: function(func, numer, denom) {
+                var hasBarLine;
+                var leftDelim = null;
+                var rightDelim = null;
+                var size = "auto";
+
+                switch (func) {
+                    case "\\dfrac":
+                    case "\\frac":
+                    case "\\tfrac":
+                        hasBarLine = true;
+                        break;
+                    case "\\dbinom":
+                    case "\\binom":
+                    case "\\tbinom":
+                        hasBarLine = false;
+                        leftDelim = "(";
+                        rightDelim = ")";
+                        break;
+                    default:
+                        throw new Error("Unrecognized genfrac command");
+                }
+
+                switch (func) {
+                    case "\\dfrac":
+                    case "\\dbinom":
+                        size = "display";
+                        break;
+                    case "\\tfrac":
+                    case "\\tbinom":
+                        size = "text";
+                        break;
+                }
+
+                return {
+                    type: "genfrac",
+                    numer: numer,
+                    denom: denom,
+                    hasBarLine: hasBarLine,
+                    leftDelim: leftDelim,
+                    rightDelim: rightDelim,
+                    size: size
+                };
+            }
+        }
+    },
+
+    // Left and right overlap functions
+    {
+        funcs: ["\\llap", "\\rlap"],
+        data: {
+            numArgs: 1,
+            allowedInText: true,
+            handler: function(func, body) {
+                return {
+                    type: func.slice(1),
+                    body: body
+                };
+            }
+        }
+    },
+
+    // Delimiter functions
+    {
+        funcs: [
+            "\\bigl", "\\Bigl", "\\biggl", "\\Biggl",
+            "\\bigr", "\\Bigr", "\\biggr", "\\Biggr",
+            "\\bigm", "\\Bigm", "\\biggm", "\\Biggm",
+            "\\big",  "\\Big",  "\\bigg",  "\\Bigg",
+            "\\left", "\\right"
+        ],
+        data: {
+            numArgs: 1,
+            handler: function(func, delim, positions) {
+                if (!utils.contains(delimiters, delim.value)) {
+                    throw new ParseError(
+                        "Invalid delimiter: '" + delim.value + "' after '" +
+                            func + "'",
+                        this.lexer, positions[1]);
+                }
+
+                // \left and \right are caught somewhere in Parser.js, which is
+                // why this data doesn't match what is in buildHTML.
+                if (func === "\\left" || func === "\\right") {
+                    return {
+                        type: "leftright",
+                        value: delim.value
+                    };
+                } else {
+                    return {
+                        type: "delimsizing",
+                        size: delimiterSizes[func].size,
+                        delimType: delimiterSizes[func].type,
+                        value: delim.value
+                    };
+                }
+            }
+        }
+    },
+
+    // Sizing functions (handled in Parser.js explicitly, hence no handler)
+    {
+        funcs: [
+            "\\tiny", "\\scriptsize", "\\footnotesize", "\\small",
+            "\\normalsize", "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge"
+        ],
+        data: {
+            numArgs: 0
+        }
+    },
+
+    // Style changing functions (handled in Parser.js explicitly, hence no
+    // handler)
+    {
+        funcs: [
+            "\\displaystyle", "\\textstyle", "\\scriptstyle",
+            "\\scriptscriptstyle"
+        ],
+        data: {
+            numArgs: 0
+        }
+    },
+
+    {
+        funcs: [
+            // styles
+            "\\mathrm", "\\mathit", "\\mathbf",
+
+            // families
+            "\\mathbb", "\\mathcal", "\\mathfrak", "\\mathscr", "\\mathsf",
+            "\\mathtt",
+
+            // aliases
+            "\\Bbb", "\\bold", "\\frak"
+        ],
+        data: {
+            numArgs: 1,
+            handler: function (func, body) {
+                if (func in fontAliases) {
+                    func = fontAliases[func];
+                }
+                return {
+                    type: "font",
+                    font: func.slice(1),
+                    body: body
+                };
+            }
+        }
+    },
+
+    // Accents
+    {
+        funcs: [
+            "\\acute", "\\grave", "\\ddot", "\\tilde", "\\bar", "\\breve",
+            "\\check", "\\hat", "\\vec", "\\dot"
+            // We don't support expanding accents yet
+            // "\\widetilde", "\\widehat"
+        ],
+        data: {
+            numArgs: 1,
+            handler: function(func, base) {
+                return {
+                    type: "accent",
+                    accent: func,
+                    base: base
+                };
+            }
+        }
+    },
+
+    // Infix generalized fractions
+    {
+        funcs: ["\\over", "\\choose"],
+        data: {
+            numArgs: 0,
+            handler: function (func) {
+                var replaceWith;
+                switch (func) {
+                    case "\\over":
+                        replaceWith = "\\frac";
+                        break;
+                    case "\\choose":
+                        replaceWith = "\\binom";
+                        break;
+                    default:
+                        throw new Error("Unrecognized infix genfrac command");
+                }
+                return {
+                    type: "infix",
+                    replaceWith: replaceWith
+                };
+            }
+        }
+    },
+
+    // Row breaks for aligned data
+    {
+        funcs: ["\\\\", "\\cr"],
+        data: {
+            numArgs: 0,
+            numOptionalArgs: 1,
+            argTypes: ["size"],
+            handler: function(func, size) {
+                return {
+                    type: "cr",
+                    size: size
+                };
+            }
+        }
+    },
+
+    // Environment delimiters
+    {
+        funcs: ["\\begin", "\\end"],
+        data: {
+            numArgs: 1,
+            argTypes: ["text"],
+            handler: function(func, nameGroup, positions) {
+                if (nameGroup.type !== "ordgroup") {
+                    throw new ParseError(
+                        "Invalid environment name",
+                        this.lexer, positions[1]);
+                }
+                var name = "";
+                for (var i = 0; i < nameGroup.value.length; ++i) {
+                    name += nameGroup.value[i].value;
+                }
+                return {
+                    type: "environment",
+                    name: name,
+                    namepos: positions[1]
+                };
+            }
+        }
+    }
+];
+
+var addFuncsWithData = function(funcs, data) {
+    for (var i = 0; i < funcs.length; i++) {
+        functions[funcs[i]] = data;
+    }
+};
+
+// Add all of the functions in duplicatedFunctions to the functions map
+for (var i = 0; i < duplicatedFunctions.length; i++) {
+    addFuncsWithData(duplicatedFunctions[i].funcs, duplicatedFunctions[i].data);
+}
+
+// Set default values of functions
+for (var f in functions) {
+    if (functions.hasOwnProperty(f)) {
+        var func = functions[f];
+
+        functions[f] = {
+            numArgs: func.numArgs,
+            argTypes: func.argTypes,
+            greediness: (func.greediness === undefined) ? 1 : func.greediness,
+            allowedInText: func.allowedInText ? func.allowedInText : false,
+            numOptionalArgs: (func.numOptionalArgs === undefined) ? 0 :
+                func.numOptionalArgs,
+            handler: func.handler
+        };
+    }
+}
+
+module.exports = {
+    funcs: functions
+};
+
+},{"./ParseError":7,"./utils":25}],21:[function(require,module,exports){
+/**
+ * These objects store data about MathML nodes. This is the MathML equivalent
+ * of the types in domTree.js. Since MathML handles its own rendering, and
+ * since we're mainly using MathML to improve accessibility, we don't manage
+ * any of the styling state that the plain DOM nodes do.
+ *
+ * The `toNode` and `toMarkup` functions work simlarly to how they do in
+ * domTree.js, creating namespaced DOM nodes and HTML text markup respectively.
+ */
+
+var utils = require("./utils");
+
+/**
+ * This node represents a general purpose MathML node of any type. The
+ * constructor requires the type of node to create (for example, `"mo"` or
+ * `"mspace"`, corresponding to `<mo>` and `<mspace>` tags).
+ */
+function MathNode(type, children) {
+    this.type = type;
+    this.attributes = {};
+    this.children = children || [];
+}
+
+/**
+ * Sets an attribute on a MathML node. MathML depends on attributes to convey a
+ * semantic content, so this is used heavily.
+ */
+MathNode.prototype.setAttribute = function(name, value) {
+    this.attributes[name] = value;
+};
+
+/**
+ * Converts the math node into a MathML-namespaced DOM element.
+ */
+MathNode.prototype.toNode = function() {
+    var node = document.createElementNS(
+        "http://www.w3.org/1998/Math/MathML", this.type);
+
+    for (var attr in this.attributes) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+            node.setAttribute(attr, this.attributes[attr]);
+        }
+    }
+
+    for (var i = 0; i < this.children.length; i++) {
+        node.appendChild(this.children[i].toNode());
+    }
+
+    return node;
+};
+
+/**
+ * Converts the math node into an HTML markup string.
+ */
+MathNode.prototype.toMarkup = function() {
+    var markup = "<" + this.type;
+
+    // Add the attributes
+    for (var attr in this.attributes) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
+            markup += " " + attr + "=\"";
+            markup += utils.escape(this.attributes[attr]);
+            markup += "\"";
+        }
+    }
+
+    markup += ">";
+
+    for (var i = 0; i < this.children.length; i++) {
+        markup += this.children[i].toMarkup();
+    }
+
+    markup += "</" + this.type + ">";
+
+    return markup;
+};
+
+/**
+ * This node represents a piece of text.
+ */
+function TextNode(text) {
+    this.text = text;
+}
+
+/**
+ * Converts the text node into a DOM text node.
+ */
+TextNode.prototype.toNode = function() {
+    return document.createTextNode(this.text);
+};
+
+/**
+ * Converts the text node into HTML markup (which is just the text itself).
+ */
+TextNode.prototype.toMarkup = function() {
+    return utils.escape(this.text);
+};
+
+module.exports = {
+    MathNode: MathNode,
+    TextNode: TextNode
+};
+
+},{"./utils":25}],22:[function(require,module,exports){
+/**
+ * The resulting parse tree nodes of the parse tree.
+ */
+function ParseNode(type, value, mode) {
+    this.type = type;
+    this.value = value;
+    this.mode = mode;
+}
+
+/**
+ * A result and final position returned by the `.parse...` functions.
+ * 
+ */
+function ParseResult(result, newPosition, peek) {
+    this.result = result;
+    this.position = newPosition;
+}
+
+module.exports = {
+    ParseNode: ParseNode,
+    ParseResult: ParseResult
+};
+
+
+},{}],23:[function(require,module,exports){
+/**
+ * Provides a single function for parsing an expression using a Parser
+ * TODO(emily): Remove this
+ */
+
+var Parser = require("./Parser");
+
+/**
+ * Parses an expression using a Parser, then returns the parsed result.
+ */
+var parseTree = function(toParse, settings) {
+    var parser = new Parser(toParse, settings);
+
+    return parser.parse();
+};
+
+module.exports = parseTree;
+
+},{"./Parser":8}],24:[function(require,module,exports){
+/**
+ * This file holds a list of all no-argument functions and single-character
+ * symbols (like 'a' or ';').
+ *
+ * For each of the symbols, there are three properties they can have:
+ * - font (required): the font to be used for this symbol. Either "main" (the
+     normal font), or "ams" (the ams fonts).
+ * - group (required): the ParseNode group type the symbol should have (i.e.
+     "textord", "mathord", etc).
+     See https://github.com/Khan/KaTeX/wiki/Examining-TeX#group-types
+ * - replace (optional): the character that this symbol or function should be
+ *   replaced with (i.e. "\phi" has a replace value of "\u03d5", the phi
+ *   character in the main font).
+ *
+ * The outermost map in the table indicates what mode the symbols should be
+ * accepted in (e.g. "math" or "text").
+ */
+
+var symbols = {
+    "math": {
+        // Relation Symbols
+        "\\equiv": {
+            font: "main",
+            group: "rel",
+            replace: "\u2261"
+        },
+        "\\prec": {
+            font: "main",
+            group: "rel",
+            replace: "\u227a"
+        },
+        "\\succ": {
+            font: "main",
+            group: "rel",
+            replace: "\u227b"
+        },
+        "\\sim": {
+            font: "main",
+            group: "rel",
+            replace: "\u223c"
+        },
+        "\\perp": {
+            font: "main",
+            group: "rel",
+            replace: "\u22a5"
+        },
+        "\\preceq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2aaf"
+        },
+        "\\succeq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2ab0"
+        },
+        "\\simeq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2243"
+        },
+        "\\mid": {
+            font: "main",
+            group: "rel",
+            replace: "\u2223"
+        },
+        "\\ll": {
+            font: "main",
+            group: "rel",
+            replace: "\u226a"
+        },
+        "\\gg": {
+            font: "main",
+            group: "rel",
+            replace: "\u226b"
+        },
+        "\\asymp": {
+            font: "main",
+            group: "rel",
+            replace: "\u224d"
+        },
+        "\\parallel": {
+            font: "main",
+            group: "rel",
+            replace: "\u2225"
+        },
+        "\\bowtie": {
+            font: "main",
+            group: "rel",
+            replace: "\u22c8"
+        },
+        "\\smile": {
+            font: "main",
+            group: "rel",
+            replace: "\u2323"
+        },
+        "\\sqsubseteq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2291"
+        },
+        "\\sqsupseteq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2292"
+        },
+        "\\doteq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2250"
+        },
+        "\\frown": {
+            font: "main",
+            group: "rel",
+            replace: "\u2322"
+        },
+        "\\ni": {
+            font: "main",
+            group: "rel",
+            replace: "\u220b"
+        },
+        "\\propto": {
+            font: "main",
+            group: "rel",
+            replace: "\u221d"
+        },
+        "\\vdash": {
+            font: "main",
+            group: "rel",
+            replace: "\u22a2"
+        },
+        "\\dashv": {
+            font: "main",
+            group: "rel",
+            replace: "\u22a3"
+        },
+        "\\owns": {
+            font: "main",
+            group: "rel",
+            replace: "\u220b"
+        },
+
+        // Punctuation
+        "\\ldotp": {
+            font: "main",
+            group: "punct",
+            replace: "\u002e"
+        },
+        "\\cdotp": {
+            font: "main",
+            group: "punct",
+            replace: "\u22c5"
+        },
+
+        // Misc Symbols
+        "\\#": {
+          font: "main",
+          group: "textord",
+          replace: "\u0023"
+        },
+        "\\&": {
+          font: "main",
+          group: "textord",
+          replace: "\u0026"
+        },
+        "\\aleph": {
+            font: "main",
+            group: "textord",
+            replace: "\u2135"
+        },
+        "\\forall": {
+            font: "main",
+            group: "textord",
+            replace: "\u2200"
+        },
+        "\\hbar": {
+            font: "main",
+            group: "textord",
+            replace: "\u210f"
+        },
+        "\\exists": {
+            font: "main",
+            group: "textord",
+            replace: "\u2203"
+        },
+        "\\nabla": {
+            font: "main",
+            group: "textord",
+            replace: "\u2207"
+        },
+        "\\flat": {
+            font: "main",
+            group: "textord",
+            replace: "\u266d"
+        },
+        "\\ell": {
+            font: "main",
+            group: "textord",
+            replace: "\u2113"
+        },
+        "\\natural": {
+            font: "main",
+            group: "textord",
+            replace: "\u266e"
+        },
+        "\\clubsuit": {
+            font: "main",
+            group: "textord",
+            replace: "\u2663"
+        },
+        "\\wp": {
+            font: "main",
+            group: "textord",
+            replace: "\u2118"
+        },
+        "\\sharp": {
+            font: "main",
+            group: "textord",
+            replace: "\u266f"
+        },
+        "\\diamondsuit": {
+            font: "main",
+            group: "textord",
+            replace: "\u2662"
+        },
+        "\\Re": {
+            font: "main",
+            group: "textord",
+            replace: "\u211c"
+        },
+        "\\heartsuit": {
+            font: "main",
+            group: "textord",
+            replace: "\u2661"
+        },
+        "\\Im": {
+            font: "main",
+            group: "textord",
+            replace: "\u2111"
+        },
+        "\\spadesuit": {
+            font: "main",
+            group: "textord",
+            replace: "\u2660"
+        },
+
+        // Math and Text
+        "\\dag": {
+            font: "main",
+            group: "textord",
+            replace: "\u2020"
+        },
+        "\\ddag": {
+            font: "main",
+            group: "textord",
+            replace: "\u2021"
+        },
+
+        // Large Delimiters
+        "\\rmoustache": {
+            font: "main",
+            group: "close",
+            replace: "\u23b1"
+        },
+        "\\lmoustache": {
+            font: "main",
+            group: "open",
+            replace: "\u23b0"
+        },
+        "\\rgroup": {
+            font: "main",
+            group: "close",
+            replace: "\u27ef"
+        },
+        "\\lgroup": {
+            font: "main",
+            group: "open",
+            replace: "\u27ee"
+        },
+
+        // Binary Operators
+        "\\mp": {
+            font: "main",
+            group: "bin",
+            replace: "\u2213"
+        },
+        "\\ominus": {
+            font: "main",
+            group: "bin",
+            replace: "\u2296"
+        },
+        "\\uplus": {
+            font: "main",
+            group: "bin",
+            replace: "\u228e"
+        },
+        "\\sqcap": {
+            font: "main",
+            group: "bin",
+            replace: "\u2293"
+        },
+        "\\ast": {
+            font: "main",
+            group: "bin",
+            replace: "\u2217"
+        },
+        "\\sqcup": {
+            font: "main",
+            group: "bin",
+            replace: "\u2294"
+        },
+        "\\bigcirc": {
+            font: "main",
+            group: "bin",
+            replace: "\u25ef"
+        },
+        "\\bullet": {
+            font: "main",
+            group: "bin",
+            replace: "\u2219"
+        },
+        "\\ddagger": {
+            font: "main",
+            group: "bin",
+            replace: "\u2021"
+        },
+        "\\wr": {
+            font: "main",
+            group: "bin",
+            replace: "\u2240"
+        },
+        "\\amalg": {
+            font: "main",
+            group: "bin",
+            replace: "\u2a3f"
+        },
+
+        // Arrow Symbols
+        "\\longleftarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27f5"
+        },
+        "\\Leftarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d0"
+        },
+        "\\Longleftarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27f8"
+        },
+        "\\longrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27f6"
+        },
+        "\\Rightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d2"
+        },
+        "\\Longrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27f9"
+        },
+        "\\leftrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2194"
+        },
+        "\\longleftrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27f7"
+        },
+        "\\Leftrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d4"
+        },
+        "\\Longleftrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u27fa"
+        },
+        "\\mapsto": {
+            font: "main",
+            group: "rel",
+            replace: "\u21a6"
+        },
+        "\\longmapsto": {
+            font: "main",
+            group: "rel",
+            replace: "\u27fc"
+        },
+        "\\nearrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2197"
+        },
+        "\\hookleftarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21a9"
+        },
+        "\\hookrightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21aa"
+        },
+        "\\searrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2198"
+        },
+        "\\leftharpoonup": {
+            font: "main",
+            group: "rel",
+            replace: "\u21bc"
+        },
+        "\\rightharpoonup": {
+            font: "main",
+            group: "rel",
+            replace: "\u21c0"
+        },
+        "\\swarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2199"
+        },
+        "\\leftharpoondown": {
+            font: "main",
+            group: "rel",
+            replace: "\u21bd"
+        },
+        "\\rightharpoondown": {
+            font: "main",
+            group: "rel",
+            replace: "\u21c1"
+        },
+        "\\nwarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2196"
+        },
+        "\\rightleftharpoons": {
+            font: "main",
+            group: "rel",
+            replace: "\u21cc"
+        },
+
+        // AMS Negated Binary Relations
+        "\\nless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u226e"
+        },
+        "\\nleqslant": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue010"
+        },
+        "\\nleqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue011"
+        },
+        "\\lneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a87"
+        },
+        "\\lneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2268"
+        },
+        "\\lvertneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue00c"
+        },
+        "\\lnsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e6"
+        },
+        "\\lnapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a89"
+        },
+        "\\nprec": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2280"
+        },
+        "\\npreceq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e0"
+        },
+        "\\precnsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e8"
+        },
+        "\\precnapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ab9"
+        },
+        "\\nsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2241"
+        },
+        "\\nshortmid": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue006"
+        },
+        "\\nmid": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2224"
+        },
+        "\\nvdash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ac"
+        },
+        "\\nvDash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ad"
+        },
+        "\\ntriangleleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ea"
+        },
+        "\\ntrianglelefteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ec"
+        },
+        "\\subsetneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u228a"
+        },
+        "\\varsubsetneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue01a"
+        },
+        "\\subsetneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2acb"
+        },
+        "\\varsubsetneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue017"
+        },
+        "\\ngtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u226f"
+        },
+        "\\ngeqslant": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue00f"
+        },
+        "\\ngeqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue00e"
+        },
+        "\\gneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a88"
+        },
+        "\\gneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2269"
+        },
+        "\\gvertneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue00d"
+        },
+        "\\gnsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e7"
+        },
+        "\\gnapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a8a"
+        },
+        "\\nsucc": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2281"
+        },
+        "\\nsucceq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e1"
+        },
+        "\\succnsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22e9"
+        },
+        "\\succnapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2aba"
+        },
+        "\\ncong": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2246"
+        },
+        "\\nshortparallel": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue007"
+        },
+        "\\nparallel": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2226"
+        },
+        "\\nVDash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22af"
+        },
+        "\\ntriangleright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22eb"
+        },
+        "\\ntrianglerighteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ed"
+        },
+        "\\nsupseteqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue018"
+        },
+        "\\supsetneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u228b"
+        },
+        "\\varsupsetneq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue01b"
+        },
+        "\\supsetneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2acc"
+        },
+        "\\varsupsetneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue019"
+        },
+        "\\nVdash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22ae"
+        },
+        "\\precneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ab5"
+        },
+        "\\succneqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ab6"
+        },
+        "\\nsubseteqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\ue016"
+        },
+        "\\unlhd": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22b4"
+        },
+        "\\unrhd": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22b5"
+        },
+
+        // AMS Negated Arrows
+         "\\nleftarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u219a"
+        },
+        "\\nrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u219b"
+        },
+        "\\nLeftarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21cd"
+        },
+        "\\nRightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21cf"
+        },
+        "\\nleftrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ae"
+        },
+        "\\nLeftrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ce"
+        },
+
+        // AMS Misc
+        "\\vartriangle": {
+            font: "ams",
+            group: "rel",
+            replace: "\u25b3"
+        },
+        "\\hslash": {
+            font: "ams",
+            group: "textord",
+            replace: "\u210f"
+        },
+        "\\triangledown": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25bd"
+        },
+        "\\lozenge": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25ca"
+        },
+        "\\circledS": {
+            font: "ams",
+            group: "textord",
+            replace: "\u24c8"
+        },
+        "\\circledR": {
+            font: "ams",
+            group: "textord",
+            replace: "\u00ae"
+        },
+        "\\measuredangle": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2221"
+        },
+        "\\nexists": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2204"
+        },
+        "\\mho": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2127"
+        },
+        "\\Finv": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2132"
+        },
+        "\\Game": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2141"
+        },
+        "\\Bbbk": {
+            font: "ams",
+            group: "textord",
+            replace: "\u006b"
+        },
+        "\\backprime": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2035"
+        },
+        "\\blacktriangle": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25b2"
+        },
+        "\\blacktriangledown": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25bc"
+        },
+        "\\blacksquare": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25a0"
+        },
+        "\\blacklozenge": {
+            font: "ams",
+            group: "textord",
+            replace: "\u29eb"
+        },
+        "\\bigstar": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2605"
+        },
+        "\\sphericalangle": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2222"
+        },
+        "\\complement": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2201"
+        },
+        "\\eth": {
+            font: "ams",
+            group: "textord",
+            replace: "\u00f0"
+        },
+        "\\diagup": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2571"
+        },
+        "\\diagdown": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2572"
+        },
+        "\\square": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25a1"
+        },
+        "\\Box": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25a1"
+        },
+        "\\Diamond": {
+            font: "ams",
+            group: "textord",
+            replace: "\u25ca"
+        },
+        "\\yen": {
+            font: "ams",
+            group: "textord",
+            replace: "\u00a5"
+        },
+        "\\checkmark": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2713"
+        },
+
+        // AMS Hebrew
+        "\\beth": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2136"
+        },
+        "\\daleth": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2138"
+        },
+        "\\gimel": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2137"
+        },
+
+        // AMS Greek
+        "\\digamma": {
+            font: "ams",
+            group: "textord",
+            replace: "\u03dd"
+        },
+        "\\varkappa": {
+            font: "ams",
+            group: "textord",
+            replace: "\u03f0"
+        },
+
+        // AMS Delimiters
+        "\\ulcorner": {
+            font: "ams",
+            group: "open",
+            replace: "\u250c"
+        },
+        "\\urcorner": {
+            font: "ams",
+            group: "close",
+            replace: "\u2510"
+        },
+        "\\llcorner": {
+            font: "ams",
+            group: "open",
+            replace: "\u2514"
+        },
+        "\\lrcorner": {
+            font: "ams",
+            group: "close",
+            replace: "\u2518"
+        },
+
+        // AMS Binary Relations
+        "\\leqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2266"
+        },
+        "\\leqslant": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a7d"
+        },
+        "\\eqslantless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a95"
+        },
+        "\\lesssim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2272"
+        },
+        "\\lessapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a85"
+        },
+        "\\approxeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u224a"
+        },
+        "\\lessdot": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d6"
+        },
+        "\\lll": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d8"
+        },
+        "\\lessgtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2276"
+        },
+        "\\lesseqgtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22da"
+        },
+        "\\lesseqqgtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a8b"
+        },
+        "\\doteqdot": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2251"
+        },
+        "\\risingdotseq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2253"
+        },
+        "\\fallingdotseq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2252"
+        },
+        "\\backsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u223d"
+        },
+        "\\backsimeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22cd"
+        },
+        "\\subseteqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ac5"
+        },
+        "\\Subset": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d0"
+        },
+        "\\sqsubset": {
+            font: "ams",
+            group: "rel",
+            replace: "\u228f"
+        },
+        "\\preccurlyeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u227c"
+        },
+        "\\curlyeqprec": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22de"
+        },
+        "\\precsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u227e"
+        },
+        "\\precapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ab7"
+        },
+        "\\vartriangleleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22b2"
+        },
+        "\\trianglelefteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22b4"
+        },
+        "\\vDash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22a8"
+        },
+        "\\Vvdash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22aa"
+        },
+        "\\smallsmile": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2323"
+        },
+        "\\smallfrown": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2322"
+        },
+        "\\bumpeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u224f"
+        },
+        "\\Bumpeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u224e"
+        },
+        "\\geqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2267"
+        },
+        "\\geqslant": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a7e"
+        },
+        "\\eqslantgtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a96"
+        },
+        "\\gtrsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2273"
+        },
+        "\\gtrapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a86"
+        },
+        "\\gtrdot": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d7"
+        },
+        "\\ggg": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d9"
+        },
+        "\\gtrless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2277"
+        },
+        "\\gtreqless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22db"
+        },
+        "\\gtreqqless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2a8c"
+        },
+        "\\eqcirc": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2256"
+        },
+        "\\circeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2257"
+        },
+        "\\triangleq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u225c"
+        },
+        "\\thicksim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u223c"
+        },
+        "\\thickapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2248"
+        },
+        "\\supseteqq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ac6"
+        },
+        "\\Supset": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d1"
+        },
+        "\\sqsupset": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2290"
+        },
+        "\\succcurlyeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u227d"
+        },
+        "\\curlyeqsucc": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22df"
+        },
+        "\\succsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u227f"
+        },
+        "\\succapprox": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2ab8"
+        },
+        "\\vartriangleright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22b3"
+        },
+        "\\trianglerighteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22b5"
+        },
+        "\\Vdash": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22a9"
+        },
+        "\\shortmid": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2223"
+        },
+        "\\shortparallel": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2225"
+        },
+        "\\between": {
+            font: "ams",
+            group: "rel",
+            replace: "\u226c"
+        },
+        "\\pitchfork": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d4"
+        },
+        "\\varpropto": {
+            font: "ams",
+            group: "rel",
+            replace: "\u221d"
+        },
+        "\\blacktriangleleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u25c0"
+        },
+        "\\therefore": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2234"
+        },
+        "\\backepsilon": {
+            font: "ams",
+            group: "rel",
+            replace: "\u220d"
+        },
+        "\\blacktriangleright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u25b6"
+        },
+        "\\because": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2235"
+        },
+        "\\llless": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d8"
+        },
+        "\\gggtr": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22d9"
+        },
+        "\\lhd": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22b2"
+        },
+        "\\rhd": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22b3"
+        },
+        "\\eqsim": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2242"
+        },
+        "\\Join": {
+            font: "main",
+            group: "rel",
+            replace: "\u22c8"
+        },
+        "\\Doteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2251"
+        },
+
+        // AMS Binary Operators
+        "\\dotplus": {
+            font: "ams",
+            group: "bin",
+            replace: "\u2214"
+        },
+        "\\smallsetminus": {
+            font: "ams",
+            group: "bin",
+            replace: "\u2216"
+        },
+        "\\Cap": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d2"
+        },
+        "\\Cup": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d3"
+        },
+        "\\doublebarwedge": {
+            font: "ams",
+            group: "bin",
+            replace: "\u2a5e"
+        },
+        "\\boxminus": {
+            font: "ams",
+            group: "bin",
+            replace: "\u229f"
+        },
+        "\\boxplus": {
+            font: "ams",
+            group: "bin",
+            replace: "\u229e"
+        },
+        "\\divideontimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22c7"
+        },
+        "\\ltimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22c9"
+        },
+        "\\rtimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22ca"
+        },
+        "\\leftthreetimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22cb"
+        },
+        "\\rightthreetimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22cc"
+        },
+        "\\curlywedge": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22cf"
+        },
+        "\\curlyvee": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22ce"
+        },
+        "\\circleddash": {
+            font: "ams",
+            group: "bin",
+            replace: "\u229d"
+        },
+        "\\circledast": {
+            font: "ams",
+            group: "bin",
+            replace: "\u229b"
+        },
+        "\\centerdot": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22c5"
+        },
+        "\\intercal": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22ba"
+        },
+        "\\doublecap": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d2"
+        },
+        "\\doublecup": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22d3"
+        },
+        "\\boxtimes": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22a0"
+        },
+
+        // AMS Arrows
+        "\\dashrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21e2"
+        },
+        "\\dashleftarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21e0"
+        },
+        "\\leftleftarrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c7"
+        },
+        "\\leftrightarrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c6"
+        },
+        "\\Lleftarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21da"
+        },
+        "\\twoheadleftarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u219e"
+        },
+        "\\leftarrowtail": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21a2"
+        },
+        "\\looparrowleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ab"
+        },
+        "\\leftrightharpoons": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21cb"
+        },
+        "\\curvearrowleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21b6"
+        },
+        "\\circlearrowleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ba"
+        },
+        "\\Lsh": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21b0"
+        },
+        "\\upuparrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c8"
+        },
+        "\\upharpoonleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21bf"
+        },
+        "\\downharpoonleft": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c3"
+        },
+        "\\multimap": {
+            font: "ams",
+            group: "rel",
+            replace: "\u22b8"
+        },
+        "\\leftrightsquigarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ad"
+        },
+        "\\rightrightarrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c9"
+        },
+        "\\rightleftarrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c4"
+        },
+        "\\twoheadrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21a0"
+        },
+        "\\rightarrowtail": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21a3"
+        },
+        "\\looparrowright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ac"
+        },
+        "\\curvearrowright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21b7"
+        },
+        "\\circlearrowright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21bb"
+        },
+        "\\Rsh": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21b1"
+        },
+        "\\downdownarrows": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21ca"
+        },
+        "\\upharpoonright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21be"
+        },
+        "\\downharpoonright": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21c2"
+        },
+        "\\rightsquigarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21dd"
+        },
+        "\\leadsto": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21dd"
+        },
+        "\\Rrightarrow": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21db"
+        },
+        "\\restriction": {
+            font: "ams",
+            group: "rel",
+            replace: "\u21be"
+        },
+
+        "`": {
+            font: "main",
+            group: "textord",
+            replace: "\u2018"
+        },
+        "\\$": {
+            font: "main",
+            group: "textord",
+            replace: "$"
+        },
+        "\\%": {
+            font: "main",
+            group: "textord",
+            replace: "%"
+        },
+        "\\_": {
+            font: "main",
+            group: "textord",
+            replace: "_"
+        },
+        "\\angle": {
+            font: "main",
+            group: "textord",
+            replace: "\u2220"
+        },
+        "\\infty": {
+            font: "main",
+            group: "textord",
+            replace: "\u221e"
+        },
+        "\\prime": {
+            font: "main",
+            group: "textord",
+            replace: "\u2032"
+        },
+        "\\triangle": {
+            font: "main",
+            group: "textord",
+            replace: "\u25b3"
+        },
+        "\\Gamma": {
+            font: "main",
+            group: "textord",
+            replace: "\u0393"
+        },
+        "\\Delta": {
+            font: "main",
+            group: "textord",
+            replace: "\u0394"
+        },
+        "\\Theta": {
+            font: "main",
+            group: "textord",
+            replace: "\u0398"
+        },
+        "\\Lambda": {
+            font: "main",
+            group: "textord",
+            replace: "\u039b"
+        },
+        "\\Xi": {
+            font: "main",
+            group: "textord",
+            replace: "\u039e"
+        },
+        "\\Pi": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a0"
+        },
+        "\\Sigma": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a3"
+        },
+        "\\Upsilon": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a5"
+        },
+        "\\Phi": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a6"
+        },
+        "\\Psi": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a8"
+        },
+        "\\Omega": {
+            font: "main",
+            group: "textord",
+            replace: "\u03a9"
+        },
+        "\\neg": {
+            font: "main",
+            group: "textord",
+            replace: "\u00ac"
+        },
+        "\\lnot": {
+            font: "main",
+            group: "textord",
+            replace: "\u00ac"
+        },
+        "\\top": {
+            font: "main",
+            group: "textord",
+            replace: "\u22a4"
+        },
+        "\\bot": {
+            font: "main",
+            group: "textord",
+            replace: "\u22a5"
+        },
+        "\\emptyset": {
+            font: "main",
+            group: "textord",
+            replace: "\u2205"
+        },
+        "\\varnothing": {
+            font: "ams",
+            group: "textord",
+            replace: "\u2205"
+        },
+        "\\alpha": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b1"
+        },
+        "\\beta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b2"
+        },
+        "\\gamma": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b3"
+        },
+        "\\delta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b4"
+        },
+        "\\epsilon": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03f5"
+        },
+        "\\zeta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b6"
+        },
+        "\\eta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b7"
+        },
+        "\\theta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b8"
+        },
+        "\\iota": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b9"
+        },
+        "\\kappa": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03ba"
+        },
+        "\\lambda": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03bb"
+        },
+        "\\mu": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03bc"
+        },
+        "\\nu": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03bd"
+        },
+        "\\xi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03be"
+        },
+        "\\omicron": {
+            font: "main",
+            group: "mathord",
+            replace: "o"
+        },
+        "\\pi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c0"
+        },
+        "\\rho": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c1"
+        },
+        "\\sigma": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c3"
+        },
+        "\\tau": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c4"
+        },
+        "\\upsilon": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c5"
+        },
+        "\\phi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03d5"
+        },
+        "\\chi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c7"
+        },
+        "\\psi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c8"
+        },
+        "\\omega": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c9"
+        },
+        "\\varepsilon": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03b5"
+        },
+        "\\vartheta": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03d1"
+        },
+        "\\varpi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03d6"
+        },
+        "\\varrho": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03f1"
+        },
+        "\\varsigma": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c2"
+        },
+        "\\varphi": {
+            font: "main",
+            group: "mathord",
+            replace: "\u03c6"
+        },
+        "*": {
+            font: "main",
+            group: "bin",
+            replace: "\u2217"
+        },
+        "+": {
+            font: "main",
+            group: "bin"
+        },
+        "-": {
+            font: "main",
+            group: "bin",
+            replace: "\u2212"
+        },
+        "\\cdot": {
+            font: "main",
+            group: "bin",
+            replace: "\u22c5"
+        },
+        "\\circ": {
+            font: "main",
+            group: "bin",
+            replace: "\u2218"
+        },
+        "\\div": {
+            font: "main",
+            group: "bin",
+            replace: "\u00f7"
+        },
+        "\\pm": {
+            font: "main",
+            group: "bin",
+            replace: "\u00b1"
+        },
+        "\\times": {
+            font: "main",
+            group: "bin",
+            replace: "\u00d7"
+        },
+        "\\cap": {
+            font: "main",
+            group: "bin",
+            replace: "\u2229"
+        },
+        "\\cup": {
+            font: "main",
+            group: "bin",
+            replace: "\u222a"
+        },
+        "\\setminus": {
+            font: "main",
+            group: "bin",
+            replace: "\u2216"
+        },
+        "\\land": {
+            font: "main",
+            group: "bin",
+            replace: "\u2227"
+        },
+        "\\lor": {
+            font: "main",
+            group: "bin",
+            replace: "\u2228"
+        },
+        "\\wedge": {
+            font: "main",
+            group: "bin",
+            replace: "\u2227"
+        },
+        "\\vee": {
+            font: "main",
+            group: "bin",
+            replace: "\u2228"
+        },
+        "\\surd": {
+            font: "main",
+            group: "textord",
+            replace: "\u221a"
+        },
+        "(": {
+            font: "main",
+            group: "open"
+        },
+        "[": {
+            font: "main",
+            group: "open"
+        },
+        "\\langle": {
+            font: "main",
+            group: "open",
+            replace: "\u27e8"
+        },
+        "\\lvert": {
+            font: "main",
+            group: "open",
+            replace: "\u2223"
+        },
+        "\\lVert": {
+            font: "main",
+            group: "open",
+            replace: "\u2225"
+        },
+        ")": {
+            font: "main",
+            group: "close"
+        },
+        "]": {
+            font: "main",
+            group: "close"
+        },
+        "?": {
+            font: "main",
+            group: "close"
+        },
+        "!": {
+            font: "main",
+            group: "close"
+        },
+        "\\rangle": {
+            font: "main",
+            group: "close",
+            replace: "\u27e9"
+        },
+        "\\rvert": {
+            font: "main",
+            group: "close",
+            replace: "\u2223"
+        },
+        "\\rVert": {
+            font: "main",
+            group: "close",
+            replace: "\u2225"
+        },
+        "=": {
+            font: "main",
+            group: "rel"
+        },
+        "<": {
+            font: "main",
+            group: "rel"
+        },
+        ">": {
+            font: "main",
+            group: "rel"
+        },
+        ":": {
+            font: "main",
+            group: "rel"
+        },
+        "\\approx": {
+            font: "main",
+            group: "rel",
+            replace: "\u2248"
+        },
+        "\\cong": {
+            font: "main",
+            group: "rel",
+            replace: "\u2245"
+        },
+        "\\ge": {
+            font: "main",
+            group: "rel",
+            replace: "\u2265"
+        },
+        "\\geq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2265"
+        },
+        "\\gets": {
+            font: "main",
+            group: "rel",
+            replace: "\u2190"
+        },
+        "\\in": {
+            font: "main",
+            group: "rel",
+            replace: "\u2208"
+        },
+        "\\notin": {
+            font: "main",
+            group: "rel",
+            replace: "\u2209"
+        },
+        "\\subset": {
+            font: "main",
+            group: "rel",
+            replace: "\u2282"
+        },
+        "\\supset": {
+            font: "main",
+            group: "rel",
+            replace: "\u2283"
+        },
+        "\\subseteq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2286"
+        },
+        "\\supseteq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2287"
+        },
+        "\\nsubseteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2288"
+        },
+        "\\nsupseteq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2289"
+        },
+        "\\models": {
+            font: "main",
+            group: "rel",
+            replace: "\u22a8"
+        },
+        "\\leftarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2190"
+        },
+        "\\le": {
+            font: "main",
+            group: "rel",
+            replace: "\u2264"
+        },
+        "\\leq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2264"
+        },
+        "\\ne": {
+            font: "main",
+            group: "rel",
+            replace: "\u2260"
+        },
+        "\\neq": {
+            font: "main",
+            group: "rel",
+            replace: "\u2260"
+        },
+        "\\rightarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2192"
+        },
+        "\\to": {
+            font: "main",
+            group: "rel",
+            replace: "\u2192"
+        },
+        "\\ngeq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2271"
+        },
+        "\\nleq": {
+            font: "ams",
+            group: "rel",
+            replace: "\u2270"
+        },
+        "\\!": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\ ": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        },
+        "~": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        },
+        "\\,": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\:": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\;": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\enspace": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\qquad": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\quad": {
+            font: "main",
+            group: "spacing"
+        },
+        "\\space": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        },
+        ",": {
+            font: "main",
+            group: "punct"
+        },
+        ";": {
+            font: "main",
+            group: "punct"
+        },
+        "\\colon": {
+            font: "main",
+            group: "punct",
+            replace: ":"
+        },
+        "\\barwedge": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22bc"
+        },
+        "\\veebar": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22bb"
+        },
+        "\\odot": {
+            font: "main",
+            group: "bin",
+            replace: "\u2299"
+        },
+        "\\oplus": {
+            font: "main",
+            group: "bin",
+            replace: "\u2295"
+        },
+        "\\otimes": {
+            font: "main",
+            group: "bin",
+            replace: "\u2297"
+        },
+        "\\partial":{
+            font: "main",
+            group: "textord",
+            replace: "\u2202"
+        },
+        "\\oslash": {
+            font: "main",
+            group: "bin",
+            replace: "\u2298"
+        },
+        "\\circledcirc": {
+            font: "ams",
+            group: "bin",
+            replace: "\u229a"
+        },
+        "\\boxdot": {
+            font: "ams",
+            group: "bin",
+            replace: "\u22a1"
+        },
+        "\\bigtriangleup": {
+            font: "main",
+            group: "bin",
+            replace: "\u25b3"
+        },
+        "\\bigtriangledown": {
+            font: "main",
+            group: "bin",
+            replace: "\u25bd"
+        },
+        "\\dagger": {
+            font: "main",
+            group: "bin",
+            replace: "\u2020"
+        },
+        "\\diamond": {
+            font: "main",
+            group: "bin",
+            replace: "\u22c4"
+        },
+        "\\star": {
+            font: "main",
+            group: "bin",
+            replace: "\u22c6"
+        },
+        "\\triangleleft": {
+            font: "main",
+            group: "bin",
+            replace: "\u25c3"
+        },
+        "\\triangleright": {
+            font: "main",
+            group: "bin",
+            replace: "\u25b9"
+        },
+        "\\{": {
+            font: "main",
+            group: "open",
+            replace: "{"
+        },
+        "\\}": {
+            font: "main",
+            group: "close",
+            replace: "}"
+        },
+        "\\lbrace": {
+            font: "main",
+            group: "open",
+            replace: "{"
+        },
+        "\\rbrace": {
+            font: "main",
+            group: "close",
+            replace: "}"
+        },
+        "\\lbrack": {
+            font: "main",
+            group: "open",
+            replace: "["
+        },
+        "\\rbrack": {
+            font: "main",
+            group: "close",
+            replace: "]"
+        },
+        "\\lfloor": {
+            font: "main",
+            group: "open",
+            replace: "\u230a"
+        },
+        "\\rfloor": {
+            font: "main",
+            group: "close",
+            replace: "\u230b"
+        },
+        "\\lceil": {
+            font: "main",
+            group: "open",
+            replace: "\u2308"
+        },
+        "\\rceil": {
+            font: "main",
+            group: "close",
+            replace: "\u2309"
+        },
+        "\\backslash": {
+            font: "main",
+            group: "textord",
+            replace: "\\"
+        },
+        "|": {
+            font: "main",
+            group: "textord",
+            replace: "\u2223"
+        },
+        "\\vert": {
+            font: "main",
+            group: "textord",
+            replace: "\u2223"
+        },
+        "\\|": {
+            font: "main",
+            group: "textord",
+            replace: "\u2225"
+        },
+        "\\Vert": {
+            font: "main",
+            group: "textord",
+            replace: "\u2225"
+        },
+        "\\uparrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2191"
+        },
+        "\\Uparrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d1"
+        },
+        "\\downarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2193"
+        },
+        "\\Downarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d3"
+        },
+        "\\updownarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u2195"
+        },
+        "\\Updownarrow": {
+            font: "main",
+            group: "rel",
+            replace: "\u21d5"
+        },
+        "\\coprod": {
+            font: "math",
+            group: "op",
+            replace: "\u2210"
+        },
+        "\\bigvee": {
+            font: "math",
+            group: "op",
+            replace: "\u22c1"
+        },
+        "\\bigwedge": {
+            font: "math",
+            group: "op",
+            replace: "\u22c0"
+        },
+        "\\biguplus": {
+            font: "math",
+            group: "op",
+            replace: "\u2a04"
+        },
+        "\\bigcap": {
+            font: "math",
+            group: "op",
+            replace: "\u22c2"
+        },
+        "\\bigcup": {
+            font: "math",
+            group: "op",
+            replace: "\u22c3"
+        },
+        "\\int": {
+            font: "math",
+            group: "op",
+            replace: "\u222b"
+        },
+        "\\intop": {
+            font: "math",
+            group: "op",
+            replace: "\u222b"
+        },
+        "\\iint": {
+            font: "math",
+            group: "op",
+            replace: "\u222c"
+        },
+        "\\iiint": {
+            font: "math",
+            group: "op",
+            replace: "\u222d"
+        },
+        "\\prod": {
+            font: "math",
+            group: "op",
+            replace: "\u220f"
+        },
+        "\\sum": {
+            font: "math",
+            group: "op",
+            replace: "\u2211"
+        },
+        "\\bigotimes": {
+            font: "math",
+            group: "op",
+            replace: "\u2a02"
+        },
+        "\\bigoplus": {
+            font: "math",
+            group: "op",
+            replace: "\u2a01"
+        },
+        "\\bigodot": {
+            font: "math",
+            group: "op",
+            replace: "\u2a00"
+        },
+        "\\oint": {
+            font: "math",
+            group: "op",
+            replace: "\u222e"
+        },
+        "\\bigsqcup": {
+            font: "math",
+            group: "op",
+            replace: "\u2a06"
+        },
+        "\\smallint": {
+            font: "math",
+            group: "op",
+            replace: "\u222b"
+        },
+        "\\ldots": {
+            font: "main",
+            group: "inner",
+            replace: "\u2026"
+        },
+        "\\cdots": {
+            font: "main",
+            group: "inner",
+            replace: "\u22ef"
+        },
+        "\\ddots": {
+            font: "main",
+            group: "inner",
+            replace: "\u22f1"
+        },
+        "\\vdots": {
+            font: "main",
+            group: "textord",
+            replace: "\u22ee"
+        },
+        "\\acute": {
+            font: "main",
+            group: "accent",
+            replace: "\u00b4"
+        },
+        "\\grave": {
+            font: "main",
+            group: "accent",
+            replace: "\u0060"
+        },
+        "\\ddot": {
+            font: "main",
+            group: "accent",
+            replace: "\u00a8"
+        },
+        "\\tilde": {
+            font: "main",
+            group: "accent",
+            replace: "\u007e"
+        },
+        "\\bar": {
+            font: "main",
+            group: "accent",
+            replace: "\u00af"
+        },
+        "\\breve": {
+            font: "main",
+            group: "accent",
+            replace: "\u02d8"
+        },
+        "\\check": {
+            font: "main",
+            group: "accent",
+            replace: "\u02c7"
+        },
+        "\\hat": {
+            font: "main",
+            group: "accent",
+            replace: "\u005e"
+        },
+        "\\vec": {
+            font: "main",
+            group: "accent",
+            replace: "\u20d7"
+        },
+        "\\dot": {
+            font: "main",
+            group: "accent",
+            replace: "\u02d9"
+        },
+
+        "\\imath": {
+            font: "main",
+            group: "mathord",
+            replace: "\u0131"
+        },
+        "\\jmath": {
+            font: "main",
+            group: "mathord",
+            replace: "\u0237"
+        }
+    },
+    "text": {
+        "\\ ": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        },
+        " ": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        },
+        "~": {
+            font: "main",
+            group: "spacing",
+            replace: "\u00a0"
+        }
+    }
+};
+
+// There are lots of symbols which are the same, so we add them in afterwards.
+
+// All of these are textords in math mode
+var mathTextSymbols = "0123456789/@.\"";
+for (var i = 0; i < mathTextSymbols.length; i++) {
+    var ch = mathTextSymbols.charAt(i);
+    symbols.math[ch] = {
+        font: "main",
+        group: "textord"
+    };
+}
+
+// All of these are textords in text mode
+var textSymbols = "0123456789`!@*()-=+[]'\";:?/.,";
+for (var i = 0; i < textSymbols.length; i++) {
+    var ch = textSymbols.charAt(i);
+    symbols.text[ch] = {
+        font: "main",
+        group: "textord"
+    };
+}
+
+// All of these are textords in text mode, and mathords in math mode
+var letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+for (var i = 0; i < letters.length; i++) {
+    var ch = letters.charAt(i);
+    symbols.math[ch] = {
+        font: "main",
+        group: "mathord"
+    };
+    symbols.text[ch] = {
+        font: "main",
+        group: "textord"
+    };
+}
+
+module.exports = symbols;
+
+},{}],25:[function(require,module,exports){
+/**
+ * This file contains a list of utility functions which are useful in other
+ * files.
+ */
+
+/**
+ * Provide an `indexOf` function which works in IE8, but defers to native if
+ * possible.
+ */
+var nativeIndexOf = Array.prototype.indexOf;
+var indexOf = function(list, elem) {
+    if (list == null) {
+        return -1;
+    }
+    if (nativeIndexOf && list.indexOf === nativeIndexOf) {
+        return list.indexOf(elem);
+    }
+    var i = 0, l = list.length;
+    for (; i < l; i++) {
+        if (list[i] === elem) {
+            return i;
+        }
+    }
+    return -1;
+};
+
+/**
+ * Return whether an element is contained in a list
+ */
+var contains = function(list, elem) {
+    return indexOf(list, elem) !== -1;
+};
+
+/**
+ * Provide a default value if a setting is undefined
+ */
+var deflt = function(setting, defaultIfUndefined) {
+    return setting === undefined ? defaultIfUndefined : setting;
+};
+
+// hyphenate and escape adapted from Facebook's React under Apache 2 license
+
+var uppercase = /([A-Z])/g;
+var hyphenate = function(str) {
+    return str.replace(uppercase, "-$1").toLowerCase();
+};
+
+var ESCAPE_LOOKUP = {
+  "&": "&amp;",
+  ">": "&gt;",
+  "<": "&lt;",
+  "\"": "&quot;",
+  "'": "&#x27;"
+};
+
+var ESCAPE_REGEX = /[&><"']/g;
+
+function escaper(match) {
+  return ESCAPE_LOOKUP[match];
+}
+
+/**
+ * Escapes text to prevent scripting attacks.
+ *
+ * @param {*} text Text value to escape.
+ * @return {string} An escaped string.
+ */
+function escape(text) {
+  return ("" + text).replace(ESCAPE_REGEX, escaper);
+}
+
+/**
+ * A function to set the text content of a DOM element in all supported
+ * browsers. Note that we don't define this if there is no document.
+ */
+var setTextContent;
+if (typeof document !== "undefined") {
+    var testNode = document.createElement("span");
+    if ("textContent" in testNode) {
+        setTextContent = function(node, text) {
+            node.textContent = text;
+        };
+    } else {
+        setTextContent = function(node, text) {
+            node.innerText = text;
+        };
+    }
+}
+
+/**
+ * A function to clear a node.
+ */
+function clearNode(node) {
+    setTextContent(node, "");
+}
+
+module.exports = {
+    contains: contains,
+    deflt: deflt,
+    escape: escape,
+    hyphenate: hyphenate,
+    indexOf: indexOf,
+    setTextContent: setTextContent,
+    clearNode: clearNode
+};
+
+},{}],26:[function(require,module,exports){
+'use strict';
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Helpers
+
+// Merge objects
+//
+function assign(obj /*from1, from2, from3, ...*/) {
+  var sources = Array.prototype.slice.call(arguments, 1);
+
+  sources.forEach(function (source) {
+    if (!source) { return; }
+
+    Object.keys(source).forEach(function (key) {
+      obj[key] = source[key];
+    });
+  });
+
+  return obj;
+}
+
+function _class(obj) { return Object.prototype.toString.call(obj); }
+function isString(obj) { return _class(obj) === '[object String]'; }
+function isObject(obj) { return _class(obj) === '[object Object]'; }
+function isRegExp(obj) { return _class(obj) === '[object RegExp]'; }
+function isFunction(obj) { return _class(obj) === '[object Function]'; }
+
+
+function escapeRE (str) { return str.replace(/[.?*+^$[\]\\(){}|-]/g, '\\$&'); }
+
+////////////////////////////////////////////////////////////////////////////////
+
+
+var defaultOptions = {
+  fuzzyLink: true,
+  fuzzyEmail: true,
+  fuzzyIP: false
+};
+
+
+function isOptionsObj(obj) {
+  return Object.keys(obj || {}).reduce(function (acc, k) {
+    return acc || defaultOptions.hasOwnProperty(k);
+  }, false);
+}
+
+
+var defaultSchemas = {
+  'http:': {
+    validate: function (text, pos, self) {
+      var tail = text.slice(pos);
+
+      if (!self.re.http) {
+        // compile lazily, because "host"-containing variables can change on tlds update.
+        self.re.http =  new RegExp(
+          '^\\/\\/' + self.re.src_auth + self.re.src_host_port_strict + self.re.src_path, 'i'
+        );
+      }
+      if (self.re.http.test(tail)) {
+        return tail.match(self.re.http)[0].length;
+      }
+      return 0;
+    }
+  },
+  'https:':  'http:',
+  'ftp:':    'http:',
+  '//':      {
+    validate: function (text, pos, self) {
+      var tail = text.slice(pos);
+
+      if (!self.re.no_http) {
+      // compile lazily, becayse "host"-containing variables can change on tlds update.
+        self.re.no_http =  new RegExp(
+          '^' + self.re.src_auth + self.re.src_host_port_strict + self.re.src_path, 'i'
+        );
+      }
+
+      if (self.re.no_http.test(tail)) {
+        // should not be `://`, that protects from errors in protocol name
+        if (pos >= 3 && text[pos - 3] === ':') { return 0; }
+        return tail.match(self.re.no_http)[0].length;
+      }
+      return 0;
+    }
+  },
+  'mailto:': {
+    validate: function (text, pos, self) {
+      var tail = text.slice(pos);
+
+      if (!self.re.mailto) {
+        self.re.mailto =  new RegExp(
+          '^' + self.re.src_email_name + '@' + self.re.src_host_strict, 'i'
+        );
+      }
+      if (self.re.mailto.test(tail)) {
+        return tail.match(self.re.mailto)[0].length;
+      }
+      return 0;
+    }
+  }
+};
+
+/*eslint-disable max-len*/
+
+// RE pattern for 2-character tlds (autogenerated by ./support/tlds_2char_gen.js)
+var tlds_2ch_src_re = 'a[cdefgilmnoqrstuwxz]|b[abdefghijmnorstvwyz]|c[acdfghiklmnoruvwxyz]|d[ejkmoz]|e[cegrstu]|f[ijkmor]|g[abdefghilmnpqrstuwy]|h[kmnrtu]|i[delmnoqrst]|j[emop]|k[eghimnprwyz]|l[abcikrstuvy]|m[acdeghklmnopqrstuvwxyz]|n[acefgilopruz]|om|p[aefghklmnrstwy]|qa|r[eosuw]|s[abcdeghijklmnortuvxyz]|t[cdfghjklmnortvwz]|u[agksyz]|v[aceginu]|w[fs]|y[et]|z[amw]';
+
+// DON'T try to make PRs with changes. Extend TLDs with LinkifyIt.tlds() instead
+var tlds_default = 'biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|рф'.split('|');
+
+/*eslint-enable max-len*/
+
+////////////////////////////////////////////////////////////////////////////////
+
+function resetScanCache(self) {
+  self.__index__ = -1;
+  self.__text_cache__   = '';
+}
+
+function createValidator(re) {
+  return function (text, pos) {
+    var tail = text.slice(pos);
+
+    if (re.test(tail)) {
+      return tail.match(re)[0].length;
+    }
+    return 0;
+  };
+}
+
+function createNormalizer() {
+  return function (match, self) {
+    self.normalize(match);
+  };
+}
+
+// Schemas compiler. Build regexps.
+//
+function compile(self) {
+
+  // Load & clone RE patterns.
+  var re = self.re = assign({}, require('./lib/re'));
+
+  // Define dynamic patterns
+  var tlds = self.__tlds__.slice();
+
+  if (!self.__tlds_replaced__) {
+    tlds.push(tlds_2ch_src_re);
+  }
+  tlds.push(re.src_xn);
+
+  re.src_tlds = tlds.join('|');
+
+  function untpl(tpl) { return tpl.replace('%TLDS%', re.src_tlds); }
+
+  re.email_fuzzy      = RegExp(untpl(re.tpl_email_fuzzy), 'i');
+  re.link_fuzzy       = RegExp(untpl(re.tpl_link_fuzzy), 'i');
+  re.link_no_ip_fuzzy = RegExp(untpl(re.tpl_link_no_ip_fuzzy), 'i');
+  re.host_fuzzy_test  = RegExp(untpl(re.tpl_host_fuzzy_test), 'i');
+
+  //
+  // Compile each schema
+  //
+
+  var aliases = [];
+
+  self.__compiled__ = {}; // Reset compiled data
+
+  function schemaError(name, val) {
+    throw new Error('(LinkifyIt) Invalid schema "' + name + '": ' + val);
+  }
+
+  Object.keys(self.__schemas__).forEach(function (name) {
+    var val = self.__schemas__[name];
+
+    // skip disabled methods
+    if (val === null) { return; }
+
+    var compiled = { validate: null, link: null };
+
+    self.__compiled__[name] = compiled;
+
+    if (isObject(val)) {
+      if (isRegExp(val.validate)) {
+        compiled.validate = createValidator(val.validate);
+      } else if (isFunction(val.validate)) {
+        compiled.validate = val.validate;
+      } else {
+        schemaError(name, val);
+      }
+
+      if (isFunction(val.normalize)) {
+        compiled.normalize = val.normalize;
+      } else if (!val.normalize) {
+        compiled.normalize = createNormalizer();
+      } else {
+        schemaError(name, val);
+      }
+
+      return;
+    }
+
+    if (isString(val)) {
+      aliases.push(name);
+      return;
+    }
+
+    schemaError(name, val);
+  });
+
+  //
+  // Compile postponed aliases
+  //
+
+  aliases.forEach(function (alias) {
+    if (!self.__compiled__[self.__schemas__[alias]]) {
+      // Silently fail on missed schemas to avoid errons on disable.
+      // schemaError(alias, self.__schemas__[alias]);
+      return;
+    }
+
+    self.__compiled__[alias].validate =
+      self.__compiled__[self.__schemas__[alias]].validate;
+    self.__compiled__[alias].normalize =
+      self.__compiled__[self.__schemas__[alias]].normalize;
+  });
+
+  //
+  // Fake record for guessed links
+  //
+  self.__compiled__[''] = { validate: null, normalize: createNormalizer() };
+
+  //
+  // Build schema condition
+  //
+  var slist = Object.keys(self.__compiled__)
+                      .filter(function(name) {
+                        // Filter disabled & fake schemas
+                        return name.length > 0 && self.__compiled__[name];
+                      })
+                      .map(escapeRE)
+                      .join('|');
+  // (?!_) cause 1.5x slowdown
+  self.re.schema_test   = RegExp('(^|(?!_)(?:>|' + re.src_ZPCc + '))(' + slist + ')', 'i');
+  self.re.schema_search = RegExp('(^|(?!_)(?:>|' + re.src_ZPCc + '))(' + slist + ')', 'ig');
+
+  self.re.pretest       = RegExp(
+                            '(' + self.re.schema_test.source + ')|' +
+                            '(' + self.re.host_fuzzy_test.source + ')|' +
+                            '@',
+                            'i');
+
+  //
+  // Cleanup
+  //
+
+  resetScanCache(self);
+}
+
+/**
+ * class Match
+ *
+ * Match result. Single element of array, returned by [[LinkifyIt#match]]
+ **/
+function Match(self, shift) {
+  var start = self.__index__,
+      end   = self.__last_index__,
+      text  = self.__text_cache__.slice(start, end);
+
+  /**
+   * Match#schema -> String
+   *
+   * Prefix (protocol) for matched string.
+   **/
+  this.schema    = self.__schema__.toLowerCase();
+  /**
+   * Match#index -> Number
+   *
+   * First position of matched string.
+   **/
+  this.index     = start + shift;
+  /**
+   * Match#lastIndex -> Number
+   *
+   * Next position after matched string.
+   **/
+  this.lastIndex = end + shift;
+  /**
+   * Match#raw -> String
+   *
+   * Matched string.
+   **/
+  this.raw       = text;
+  /**
+   * Match#text -> String
+   *
+   * Notmalized text of matched string.
+   **/
+  this.text      = text;
+  /**
+   * Match#url -> String
+   *
+   * Normalized url of matched string.
+   **/
+  this.url       = text;
+}
+
+function createMatch(self, shift) {
+  var match = new Match(self, shift);
+
+  self.__compiled__[match.schema].normalize(match, self);
+
+  return match;
+}
+
+
+/**
+ * class LinkifyIt
+ **/
+
+/**
+ * new LinkifyIt(schemas, options)
+ * - schemas (Object): Optional. Additional schemas to validate (prefix/validator)
+ * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
+ *
+ * Creates new linkifier instance with optional additional schemas.
+ * Can be called without `new` keyword for convenience.
+ *
+ * By default understands:
+ *
+ * - `http(s)://...` , `ftp://...`, `mailto:...` & `//...` links
+ * - "fuzzy" links and emails (example.com, foo@bar.com).
+ *
+ * `schemas` is an object, where each key/value describes protocol/rule:
+ *
+ * - __key__ - link prefix (usually, protocol name with `:` at the end, `skype:`
+ *   for example). `linkify-it` makes shure that prefix is not preceeded with
+ *   alphanumeric char and symbols. Only whitespaces and punctuation allowed.
+ * - __value__ - rule to check tail after link prefix
+ *   - _String_ - just alias to existing rule
+ *   - _Object_
+ *     - _validate_ - validator function (should return matched length on success),
+ *       or `RegExp`.
+ *     - _normalize_ - optional function to normalize text & url of matched result
+ *       (for example, for @twitter mentions).
+ *
+ * `options`:
+ *
+ * - __fuzzyLink__ - recognige URL-s without `http(s):` prefix. Default `true`.
+ * - __fuzzyIP__ - allow IPs in fuzzy links above. Can conflict with some texts
+ *   like version numbers. Default `false`.
+ * - __fuzzyEmail__ - recognize emails without `mailto:` prefix.
+ *
+ **/
+function LinkifyIt(schemas, options) {
+  if (!(this instanceof LinkifyIt)) {
+    return new LinkifyIt(schemas, options);
+  }
+
+  if (!options) {
+    if (isOptionsObj(schemas)) {
+      options = schemas;
+      schemas = {};
+    }
+  }
+
+  this.__opts__           = assign({}, defaultOptions, options);
+
+  // Cache last tested result. Used to skip repeating steps on next `match` call.
+  this.__index__          = -1;
+  this.__last_index__     = -1; // Next scan position
+  this.__schema__         = '';
+  this.__text_cache__     = '';
+
+  this.__schemas__        = assign({}, defaultSchemas, schemas);
+  this.__compiled__       = {};
+
+  this.__tlds__           = tlds_default;
+  this.__tlds_replaced__  = false;
+
+  this.re = {};
+
+  compile(this);
+}
+
+
+/** chainable
+ * LinkifyIt#add(schema, definition)
+ * - schema (String): rule name (fixed pattern prefix)
+ * - definition (String|RegExp|Object): schema definition
+ *
+ * Add new rule definition. See constructor description for details.
+ **/
+LinkifyIt.prototype.add = function add(schema, definition) {
+  this.__schemas__[schema] = definition;
+  compile(this);
+  return this;
+};
+
+
+/** chainable
+ * LinkifyIt#set(options)
+ * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
+ *
+ * Set recognition options for links without schema.
+ **/
+LinkifyIt.prototype.set = function set(options) {
+  this.__opts__ = assign(this.__opts__, options);
+  return this;
+};
+
+
+/**
+ * LinkifyIt#test(text) -> Boolean
+ *
+ * Searches linkifiable pattern and returns `true` on success or `false` on fail.
+ **/
+LinkifyIt.prototype.test = function test(text) {
+  // Reset scan cache
+  this.__text_cache__ = text;
+  this.__index__      = -1;
+
+  if (!text.length) { return false; }
+
+  var m, ml, me, len, shift, next, re, tld_pos, at_pos;
+
+  // try to scan for link with schema - that's the most simple rule
+  if (this.re.schema_test.test(text)) {
+    re = this.re.schema_search;
+    re.lastIndex = 0;
+    while ((m = re.exec(text)) !== null) {
+      len = this.testSchemaAt(text, m[2], re.lastIndex);
+      if (len) {
+        this.__schema__     = m[2];
+        this.__index__      = m.index + m[1].length;
+        this.__last_index__ = m.index + m[0].length + len;
+        break;
+      }
+    }
+  }
+
+  if (this.__opts__.fuzzyLink && this.__compiled__['http:']) {
+    // guess schemaless links
+    tld_pos = text.search(this.re.host_fuzzy_test);
+    if (tld_pos >= 0) {
+      // if tld is located after found link - no need to check fuzzy pattern
+      if (this.__index__ < 0 || tld_pos < this.__index__) {
+        if ((ml = text.match(this.__opts__.fuzzyIP ? this.re.link_fuzzy : this.re.link_no_ip_fuzzy)) !== null) {
+
+          shift = ml.index + ml[1].length;
+
+          if (this.__index__ < 0 || shift < this.__index__) {
+            this.__schema__     = '';
+            this.__index__      = shift;
+            this.__last_index__ = ml.index + ml[0].length;
+          }
+        }
+      }
+    }
+  }
+
+  if (this.__opts__.fuzzyEmail && this.__compiled__['mailto:']) {
+    // guess schemaless emails
+    at_pos = text.indexOf('@');
+    if (at_pos >= 0) {
+      // We can't skip this check, because this cases are possible:
+      // 192.168.1.1@gmail.com, my.in@example.com
+      if ((me = text.match(this.re.email_fuzzy)) !== null) {
+
+        shift = me.index + me[1].length;
+        next  = me.index + me[0].length;
+
+        if (this.__index__ < 0 || shift < this.__index__ ||
+            (shift === this.__index__ && next > this.__last_index__)) {
+          this.__schema__     = 'mailto:';
+          this.__index__      = shift;
+          this.__last_index__ = next;
+        }
+      }
+    }
+  }
+
+  return this.__index__ >= 0;
+};
+
+
+/**
+ * LinkifyIt#pretest(text) -> Boolean
+ *
+ * Very quick check, that can give false positives. Returns true if link MAY BE
+ * can exists. Can be used for speed optimization, when you need to check that
+ * link NOT exists.
+ **/
+LinkifyIt.prototype.pretest = function pretest(text) {
+  return this.re.pretest.test(text);
+};
+
+
+/**
+ * LinkifyIt#testSchemaAt(text, name, position) -> Number
+ * - text (String): text to scan
+ * - name (String): rule (schema) name
+ * - position (Number): text offset to check from
+ *
+ * Similar to [[LinkifyIt#test]] but checks only specific protocol tail exactly
+ * at given position. Returns length of found pattern (0 on fail).
+ **/
+LinkifyIt.prototype.testSchemaAt = function testSchemaAt(text, schema, pos) {
+  // If not supported schema check requested - terminate
+  if (!this.__compiled__[schema.toLowerCase()]) {
+    return 0;
+  }
+  return this.__compiled__[schema.toLowerCase()].validate(text, pos, this);
+};
+
+
+/**
+ * LinkifyIt#match(text) -> Array|null
+ *
+ * Returns array of found link descriptions or `null` on fail. We strongly
+ * to use [[LinkifyIt#test]] first, for best speed.
+ *
+ * ##### Result match description
+ *
+ * - __schema__ - link schema, can be empty for fuzzy links, or `//` for
+ *   protocol-neutral  links.
+ * - __index__ - offset of matched text
+ * - __lastIndex__ - index of next char after mathch end
+ * - __raw__ - matched text
+ * - __text__ - normalized text
+ * - __url__ - link, generated from matched text
+ **/
+LinkifyIt.prototype.match = function match(text) {
+  var shift = 0, result = [];
+
+  // Try to take previous element from cache, if .test() called before
+  if (this.__index__ >= 0 && this.__text_cache__ === text) {
+    result.push(createMatch(this, shift));
+    shift = this.__last_index__;
+  }
+
+  // Cut head if cache was used
+  var tail = shift ? text.slice(shift) : text;
+
+  // Scan string until end reached
+  while (this.test(tail)) {
+    result.push(createMatch(this, shift));
+
+    tail = tail.slice(this.__last_index__);
+    shift += this.__last_index__;
+  }
+
+  if (result.length) {
+    return result;
+  }
+
+  return null;
+};
+
+
+/** chainable
+ * LinkifyIt#tlds(list [, keepOld]) -> this
+ * - list (Array): list of tlds
+ * - keepOld (Boolean): merge with current list if `true` (`false` by default)
+ *
+ * Load (or merge) new tlds list. Those are user for fuzzy links (without prefix)
+ * to avoid false positives. By default this algorythm used:
+ *
+ * - hostname with any 2-letter root zones are ok.
+ * - biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|рф
+ *   are ok.
+ * - encoded (`xn--...`) root zones are ok.
+ *
+ * If list is replaced, then exact match for 2-chars root zones will be checked.
+ **/
+LinkifyIt.prototype.tlds = function tlds(list, keepOld) {
+  list = Array.isArray(list) ? list : [ list ];
+
+  if (!keepOld) {
+    this.__tlds__ = list.slice();
+    this.__tlds_replaced__ = true;
+    compile(this);
+    return this;
+  }
+
+  this.__tlds__ = this.__tlds__.concat(list)
+                                  .sort()
+                                  .filter(function(el, idx, arr) {
+                                    return el !== arr[idx - 1];
+                                  })
+                                  .reverse();
+
+  compile(this);
+  return this;
+};
+
+/**
+ * LinkifyIt#normalize(match)
+ *
+ * Default normalizer (if schema does not define it's own).
+ **/
+LinkifyIt.prototype.normalize = function normalize(match) {
+
+  // Do minimal possible changes by default. Need to collect feedback prior
+  // to move forward https://github.com/markdown-it/linkify-it/issues/1
+
+  if (!match.schema) { match.url = 'http://' + match.url; }
+
+  if (match.schema === 'mailto:' && !/^mailto:/i.test(match.url)) {
+    match.url = 'mailto:' + match.url;
+  }
+};
+
+
+module.exports = LinkifyIt;
+
+},{"./lib/re":27}],27:[function(require,module,exports){
+'use strict';
+
+// Use direct extract instead of `regenerate` to reduse browserified size
+var src_Any = exports.src_Any = require('uc.micro/properties/Any/regex').source;
+var src_Cc  = exports.src_Cc = require('uc.micro/categories/Cc/regex').source;
+var src_Z   = exports.src_Z  = require('uc.micro/categories/Z/regex').source;
+var src_P   = exports.src_P  = require('uc.micro/categories/P/regex').source;
+
+// \p{\Z\P\Cc\CF} (white spaces + control + format + punctuation)
+var src_ZPCc = exports.src_ZPCc = [ src_Z, src_P, src_Cc ].join('|');
+
+// \p{\Z\Cc} (white spaces + control)
+var src_ZCc = exports.src_ZCc = [ src_Z, src_Cc ].join('|');
+
+// All possible word characters (everything without punctuation, spaces & controls)
+// Defined via punctuation & spaces to save space
+// Should be something like \p{\L\N\S\M} (\w but without `_`)
+var src_pseudo_letter       = '(?:(?!' + src_ZPCc + ')' + src_Any + ')';
+// The same as abothe but without [0-9]
+var src_pseudo_letter_non_d = '(?:(?![0-9]|' + src_ZPCc + ')' + src_Any + ')';
+
+////////////////////////////////////////////////////////////////////////////////
+
+var src_ip4 = exports.src_ip4 =
+
+  '(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)';
+
+exports.src_auth    = '(?:(?:(?!' + src_ZCc + ').)+@)?';
+
+var src_port = exports.src_port =
+
+  '(?::(?:6(?:[0-4]\\d{3}|5(?:[0-4]\\d{2}|5(?:[0-2]\\d|3[0-5])))|[1-5]?\\d{1,4}))?';
+
+var src_host_terminator = exports.src_host_terminator =
+
+  '(?=$|' + src_ZPCc + ')(?!-|_|:\\d|\\.-|\\.(?!$|' + src_ZPCc + '))';
+
+var src_path = exports.src_path =
+
+  '(?:' +
+    '[/?#]' +
+      '(?:' +
+        '(?!' + src_ZCc + '|[()[\\]{}.,"\'?!\\-]).|' +
+        '\\[(?:(?!' + src_ZCc + '|\\]).)*\\]|' +
+        '\\((?:(?!' + src_ZCc + '|[)]).)*\\)|' +
+        '\\{(?:(?!' + src_ZCc + '|[}]).)*\\}|' +
+        '\\"(?:(?!' + src_ZCc + '|["]).)+\\"|' +
+        "\\'(?:(?!" + src_ZCc + "|[']).)+\\'|" +
+        "\\'(?=" + src_pseudo_letter + ').|' +  // allow `I'm_king` if no pair found
+        '\\.{2,3}[a-zA-Z0-9%/]|' + // github has ... in commit range links. Restrict to
+                                   // - english
+                                   // - percent-encoded
+                                   // - parts of file path
+                                   // until more examples found.
+        '\\.(?!' + src_ZCc + '|[.]).|' +
+        '\\-(?!--(?:[^-]|$))(?:-*)|' +  // `---` => long dash, terminate
+        '\\,(?!' + src_ZCc + ').|' +      // allow `,,,` in paths
+        '\\!(?!' + src_ZCc + '|[!]).|' +
+        '\\?(?!' + src_ZCc + '|[?]).' +
+      ')+' +
+    '|\\/' +
+  ')?';
+
+var src_email_name = exports.src_email_name =
+
+  '[\\-;:&=\\+\\$,\\"\\.a-zA-Z0-9_]+';
+
+var src_xn = exports.src_xn =
+
+  'xn--[a-z0-9\\-]{1,59}';
+
+// More to read about domain names
+// http://serverfault.com/questions/638260/
+
+var src_domain_root = exports.src_domain_root =
+
+  // Can't have digits and dashes
+  '(?:' +
+    src_xn +
+    '|' +
+    src_pseudo_letter_non_d + '{1,63}' +
+  ')';
+
+var src_domain = exports.src_domain =
+
+  '(?:' +
+    src_xn +
+    '|' +
+    '(?:' + src_pseudo_letter + ')' +
+    '|' +
+    // don't allow `--` in domain names, because:
+    // - that can conflict with markdown &mdash; / &ndash;
+    // - nobody use those anyway
+    '(?:' + src_pseudo_letter + '(?:-(?!-)|' + src_pseudo_letter + '){0,61}' + src_pseudo_letter + ')' +
+  ')';
+
+var src_host = exports.src_host =
+
+  '(?:' +
+    src_ip4 +
+  '|' +
+    '(?:(?:(?:' + src_domain + ')\\.)*' + src_domain_root + ')' +
+  ')';
+
+var tpl_host_fuzzy = exports.tpl_host_fuzzy =
+
+  '(?:' +
+    src_ip4 +
+  '|' +
+    '(?:(?:(?:' + src_domain + ')\\.)+(?:%TLDS%))' +
+  ')';
+
+var tpl_host_no_ip_fuzzy = exports.tpl_host_no_ip_fuzzy =
+
+  '(?:(?:(?:' + src_domain + ')\\.)+(?:%TLDS%))';
+
+exports.src_host_strict =
+
+  src_host + src_host_terminator;
+
+var tpl_host_fuzzy_strict = exports.tpl_host_fuzzy_strict =
+
+  tpl_host_fuzzy + src_host_terminator;
+
+exports.src_host_port_strict =
+
+  src_host + src_port + src_host_terminator;
+
+var tpl_host_port_fuzzy_strict = exports.tpl_host_port_fuzzy_strict =
+
+  tpl_host_fuzzy + src_port + src_host_terminator;
+
+var tpl_host_port_no_ip_fuzzy_strict = exports.tpl_host_port_no_ip_fuzzy_strict =
+
+  tpl_host_no_ip_fuzzy + src_port + src_host_terminator;
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Main rules
+
+// Rude test fuzzy links by host, for quick deny
+exports.tpl_host_fuzzy_test =
+
+  'localhost|\\.\\d{1,3}\\.|(?:\\.(?:%TLDS%)(?:' + src_ZPCc + '|$))';
+
+exports.tpl_email_fuzzy =
+
+    '(^|>|' + src_ZCc + ')(' + src_email_name + '@' + tpl_host_fuzzy_strict + ')';
+
+exports.tpl_link_fuzzy =
+    // Fuzzy link can't be prepended with .:/\- and non punctuation.
+    // but can start with > (markdown blockquote)
+    '(^|(?![.:/\\-_@])(?:[$+<=>^`|]|' + src_ZPCc + '))' +
+    '((?![$+<=>^`|])' + tpl_host_port_fuzzy_strict + src_path + ')';
+
+exports.tpl_link_no_ip_fuzzy =
+    // Fuzzy link can't be prepended with .:/\- and non punctuation.
+    // but can start with > (markdown blockquote)
+    '(^|(?![.:/\\-_@])(?:[$+<=>^`|]|' + src_ZPCc + '))' +
+    '((?![$+<=>^`|])' + tpl_host_port_no_ip_fuzzy_strict + src_path + ')';
+
+},{"uc.micro/categories/Cc/regex":86,"uc.micro/categories/P/regex":88,"uc.micro/categories/Z/regex":89,"uc.micro/properties/Any/regex":91}],28:[function(require,module,exports){
+'use strict';
+
+
+module.exports = require('./lib/');
+
+},{"./lib/":37}],29:[function(require,module,exports){
+// HTML5 entities map: { name -> utf16string }
+//
+'use strict';
+
+/*eslint quotes:0*/
+module.exports = require('entities/maps/entities.json');
+
+},{"entities/maps/entities.json":3}],30:[function(require,module,exports){
+// List of valid html blocks names, accorting to commonmark spec
+// http://jgm.github.io/CommonMark/spec.html#html-blocks
+
+'use strict';
+
+
+module.exports = [
+  'address',
+  'article',
+  'aside',
+  'base',
+  'basefont',
+  'blockquote',
+  'body',
+  'caption',
+  'center',
+  'col',
+  'colgroup',
+  'dd',
+  'details',
+  'dialog',
+  'dir',
+  'div',
+  'dl',
+  'dt',
+  'fieldset',
+  'figcaption',
+  'figure',
+  'footer',
+  'form',
+  'frame',
+  'frameset',
+  'h1',
+  'head',
+  'header',
+  'hr',
+  'html',
+  'iframe',
+  'legend',
+  'li',
+  'link',
+  'main',
+  'menu',
+  'menuitem',
+  'meta',
+  'nav',
+  'noframes',
+  'ol',
+  'optgroup',
+  'option',
+  'p',
+  'param',
+  'pre',
+  'section',
+  'source',
+  'title',
+  'summary',
+  'table',
+  'tbody',
+  'td',
+  'tfoot',
+  'th',
+  'thead',
+  'title',
+  'tr',
+  'track',
+  'ul'
+];
+
+},{}],31:[function(require,module,exports){
+// Regexps to match html elements
+
+'use strict';
+
+var attr_name     = '[a-zA-Z_:][a-zA-Z0-9:._-]*';
+
+var unquoted      = '[^"\'=<>`\\x00-\\x20]+';
+var single_quoted = "'[^']*'";
+var double_quoted = '"[^"]*"';
+
+var attr_value  = '(?:' + unquoted + '|' + single_quoted + '|' + double_quoted + ')';
+
+var attribute   = '(?:\\s+' + attr_name + '(?:\\s*=\\s*' + attr_value + ')?)';
+
+var open_tag    = '<[A-Za-z][A-Za-z0-9\\-]*' + attribute + '*\\s*\\/?>';
+
+var close_tag   = '<\\/[A-Za-z][A-Za-z0-9\\-]*\\s*>';
+var comment     = '<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->';
+var processing  = '<[?].*?[?]>';
+var declaration = '<![A-Z]+\\s+[^>]*>';
+var cdata       = '<!\\[CDATA\\[[\\s\\S]*?\\]\\]>';
+
+var HTML_TAG_RE = new RegExp('^(?:' + open_tag + '|' + close_tag + '|' + comment +
+                        '|' + processing + '|' + declaration + '|' + cdata + ')');
+var HTML_OPEN_CLOSE_TAG_RE = new RegExp('^(?:' + open_tag + '|' + close_tag + ')');
+
+module.exports.HTML_TAG_RE = HTML_TAG_RE;
+module.exports.HTML_OPEN_CLOSE_TAG_RE = HTML_OPEN_CLOSE_TAG_RE;
+
+},{}],32:[function(require,module,exports){
+// Utilities
+//
+'use strict';
+
+
+function _class(obj) { return Object.prototype.toString.call(obj); }
+
+function isString(obj) { return _class(obj) === '[object String]'; }
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function has(object, key) {
+  return _hasOwnProperty.call(object, key);
+}
+
+// Merge objects
+//
+function assign(obj /*from1, from2, from3, ...*/) {
+  var sources = Array.prototype.slice.call(arguments, 1);
+
+  sources.forEach(function (source) {
+    if (!source) { return; }
+
+    if (typeof source !== 'object') {
+      throw new TypeError(source + 'must be object');
+    }
+
+    Object.keys(source).forEach(function (key) {
+      obj[key] = source[key];
+    });
+  });
+
+  return obj;
+}
+
+// Remove element from array and put another array at those position.
+// Useful for some operations with tokens
+function arrayReplaceAt(src, pos, newElements) {
+  return [].concat(src.slice(0, pos), newElements, src.slice(pos + 1));
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+function isValidEntityCode(c) {
+  /*eslint no-bitwise:0*/
+  // broken sequence
+  if (c >= 0xD800 && c <= 0xDFFF) { return false; }
+  // never used
+  if (c >= 0xFDD0 && c <= 0xFDEF) { return false; }
+  if ((c & 0xFFFF) === 0xFFFF || (c & 0xFFFF) === 0xFFFE) { return false; }
+  // control codes
+  if (c >= 0x00 && c <= 0x08) { return false; }
+  if (c === 0x0B) { return false; }
+  if (c >= 0x0E && c <= 0x1F) { return false; }
+  if (c >= 0x7F && c <= 0x9F) { return false; }
+  // out of range
+  if (c > 0x10FFFF) { return false; }
+  return true;
+}
+
+function fromCodePoint(c) {
+  /*eslint no-bitwise:0*/
+  if (c > 0xffff) {
+    c -= 0x10000;
+    var surrogate1 = 0xd800 + (c >> 10),
+        surrogate2 = 0xdc00 + (c & 0x3ff);
+
+    return String.fromCharCode(surrogate1, surrogate2);
+  }
+  return String.fromCharCode(c);
+}
+
+
+var UNESCAPE_MD_RE  = /\\([!"#$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~])/g;
+var ENTITY_RE       = /&([a-z#][a-z0-9]{1,31});/gi;
+var UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + '|' + ENTITY_RE.source, 'gi');
+
+var DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))/i;
+
+var entities = require('./entities');
+
+function replaceEntityPattern(match, name) {
+  var code = 0;
+
+  if (has(entities, name)) {
+    return entities[name];
+  }
+
+  if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
+    code = name[1].toLowerCase() === 'x' ?
+      parseInt(name.slice(2), 16)
+    :
+      parseInt(name.slice(1), 10);
+    if (isValidEntityCode(code)) {
+      return fromCodePoint(code);
+    }
+  }
+
+  return match;
+}
+
+/*function replaceEntities(str) {
+  if (str.indexOf('&') < 0) { return str; }
+
+  return str.replace(ENTITY_RE, replaceEntityPattern);
+}*/
+
+function unescapeMd(str) {
+  if (str.indexOf('\\') < 0) { return str; }
+  return str.replace(UNESCAPE_MD_RE, '$1');
+}
+
+function unescapeAll(str) {
+  if (str.indexOf('\\') < 0 && str.indexOf('&') < 0) { return str; }
+
+  return str.replace(UNESCAPE_ALL_RE, function(match, escaped, entity) {
+    if (escaped) { return escaped; }
+    return replaceEntityPattern(match, entity);
+  });
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+var HTML_ESCAPE_TEST_RE = /[&<>"]/;
+var HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
+var HTML_REPLACEMENTS = {
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '"': '&quot;'
+};
+
+function replaceUnsafeChar(ch) {
+  return HTML_REPLACEMENTS[ch];
+}
+
+function escapeHtml(str) {
+  if (HTML_ESCAPE_TEST_RE.test(str)) {
+    return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
+  }
+  return str;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+var REGEXP_ESCAPE_RE = /[.?*+^$[\]\\(){}|-]/g;
+
+function escapeRE (str) {
+  return str.replace(REGEXP_ESCAPE_RE, '\\$&');
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+function isSpace(code) {
+  switch (code) {
+    case 0x09:
+    case 0x20:
+      return true;
+  }
+  return false;
+}
+
+// Zs (unicode class) || [\t\f\v\r\n]
+function isWhiteSpace(code) {
+  if (code >= 0x2000 && code <= 0x200A) { return true; }
+  switch (code) {
+    case 0x09: // \t
+    case 0x0A: // \n
+    case 0x0B: // \v
+    case 0x0C: // \f
+    case 0x0D: // \r
+    case 0x20:
+    case 0xA0:
+    case 0x1680:
+    case 0x202F:
+    case 0x205F:
+    case 0x3000:
+      return true;
+  }
+  return false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+/*eslint-disable max-len*/
+var UNICODE_PUNCT_RE = require('uc.micro/categories/P/regex');
+
+// Currently without astral characters support.
+function isPunctChar(ch) {
+  return UNICODE_PUNCT_RE.test(ch);
+}
+
+
+// Markdown ASCII punctuation characters.
+//
+// !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
+// http://spec.commonmark.org/0.15/#ascii-punctuation-character
+//
+// Don't confuse with unicode punctuation !!! It lacks some chars in ascii range.
+//
+function isMdAsciiPunct(ch) {
+  switch (ch) {
+    case 0x21/* ! */:
+    case 0x22/* " */:
+    case 0x23/* # */:
+    case 0x24/* $ */:
+    case 0x25/* % */:
+    case 0x26/* & */:
+    case 0x27/* ' */:
+    case 0x28/* ( */:
+    case 0x29/* ) */:
+    case 0x2A/* * */:
+    case 0x2B/* + */:
+    case 0x2C/* , */:
+    case 0x2D/* - */:
+    case 0x2E/* . */:
+    case 0x2F/* / */:
+    case 0x3A/* : */:
+    case 0x3B/* ; */:
+    case 0x3C/* < */:
+    case 0x3D/* = */:
+    case 0x3E/* > */:
+    case 0x3F/* ? */:
+    case 0x40/* @ */:
+    case 0x5B/* [ */:
+    case 0x5C/* \ */:
+    case 0x5D/* ] */:
+    case 0x5E/* ^ */:
+    case 0x5F/* _ */:
+    case 0x60/* ` */:
+    case 0x7B/* { */:
+    case 0x7C/* | */:
+    case 0x7D/* } */:
+    case 0x7E/* ~ */:
+      return true;
+    default:
+      return false;
+  }
+}
+
+// Hepler to unify [reference labels].
+//
+function normalizeReference(str) {
+  // use .toUpperCase() instead of .toLowerCase()
+  // here to avoid a conflict with Object.prototype
+  // members (most notably, `__proto__`)
+  return str.trim().replace(/\s+/g, ' ').toUpperCase();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+// Re-export libraries commonly used in both markdown-it and its plugins,
+// so plugins won't have to depend on them explicitly, which reduces their
+// bundled size (e.g. a browser build).
+//
+exports.lib                 = {};
+exports.lib.mdurl           = require('mdurl');
+exports.lib.ucmicro         = require('uc.micro');
+
+exports.assign              = assign;
+exports.isString            = isString;
+exports.has                 = has;
+exports.unescapeMd          = unescapeMd;
+exports.unescapeAll         = unescapeAll;
+exports.isValidEntityCode   = isValidEntityCode;
+exports.fromCodePoint       = fromCodePoint;
+// exports.replaceEntities     = replaceEntities;
+exports.escapeHtml          = escapeHtml;
+exports.arrayReplaceAt      = arrayReplaceAt;
+exports.isSpace             = isSpace;
+exports.isWhiteSpace        = isWhiteSpace;
+exports.isMdAsciiPunct      = isMdAsciiPunct;
+exports.isPunctChar         = isPunctChar;
+exports.escapeRE            = escapeRE;
+exports.normalizeReference  = normalizeReference;
+
+},{"./entities":29,"mdurl":84,"uc.micro":90,"uc.micro/categories/P/regex":88}],33:[function(require,module,exports){
+// Just a shortcut for bulk export
+'use strict';
+
+
+exports.parseLinkLabel       = require('./parse_link_label');
+exports.parseLinkDestination = require('./parse_link_destination');
+exports.parseLinkTitle       = require('./parse_link_title');
+
+},{"./parse_link_destination":34,"./parse_link_label":35,"./parse_link_title":36}],34:[function(require,module,exports){
+// Parse link destination
+//
+'use strict';
+
+
+var isSpace     = require('../common/utils').isSpace;
+var unescapeAll = require('../common/utils').unescapeAll;
+
+
+module.exports = function parseLinkDestination(str, pos, max) {
+  var code, level,
+      lines = 0,
+      start = pos,
+      result = {
+        ok: false,
+        pos: 0,
+        lines: 0,
+        str: ''
+      };
+
+  if (str.charCodeAt(pos) === 0x3C /* < */) {
+    pos++;
+    while (pos < max) {
+      code = str.charCodeAt(pos);
+      if (code === 0x0A /* \n */ || isSpace(code)) { return result; }
+      if (code === 0x3E /* > */) {
+        result.pos = pos + 1;
+        result.str = unescapeAll(str.slice(start + 1, pos));
+        result.ok = true;
+        return result;
+      }
+      if (code === 0x5C /* \ */ && pos + 1 < max) {
+        pos += 2;
+        continue;
+      }
+
+      pos++;
+    }
+
+    // no closing '>'
+    return result;
+  }
+
+  // this should be ... } else { ... branch
+
+  level = 0;
+  while (pos < max) {
+    code = str.charCodeAt(pos);
+
+    if (code === 0x20) { break; }
+
+    // ascii control characters
+    if (code < 0x20 || code === 0x7F) { break; }
+
+    if (code === 0x5C /* \ */ && pos + 1 < max) {
+      pos += 2;
+      continue;
+    }
+
+    if (code === 0x28 /* ( */) {
+      level++;
+      if (level > 1) { break; }
+    }
+
+    if (code === 0x29 /* ) */) {
+      level--;
+      if (level < 0) { break; }
+    }
+
+    pos++;
+  }
+
+  if (start === pos) { return result; }
+
+  result.str = unescapeAll(str.slice(start, pos));
+  result.lines = lines;
+  result.pos = pos;
+  result.ok = true;
+  return result;
+};
+
+},{"../common/utils":32}],35:[function(require,module,exports){
+// Parse link label
+//
+// this function assumes that first character ("[") already matches;
+// returns the end of the label
+//
+'use strict';
+
+module.exports = function parseLinkLabel(state, start, disableNested) {
+  var level, found, marker, prevPos,
+      labelEnd = -1,
+      max = state.posMax,
+      oldPos = state.pos;
+
+  state.pos = start + 1;
+  level = 1;
+
+  while (state.pos < max) {
+    marker = state.src.charCodeAt(state.pos);
+    if (marker === 0x5D /* ] */) {
+      level--;
+      if (level === 0) {
+        found = true;
+        break;
+      }
+    }
+
+    prevPos = state.pos;
+    state.md.inline.skipToken(state);
+    if (marker === 0x5B /* [ */) {
+      if (prevPos === state.pos - 1) {
+        // increase level if we find text `[`, which is not a part of any token
+        level++;
+      } else if (disableNested) {
+        state.pos = oldPos;
+        return -1;
+      }
+    }
+  }
+
+  if (found) {
+    labelEnd = state.pos;
+  }
+
+  // restore old state
+  state.pos = oldPos;
+
+  return labelEnd;
+};
+
+},{}],36:[function(require,module,exports){
+// Parse link title
+//
+'use strict';
+
+
+var unescapeAll = require('../common/utils').unescapeAll;
+
+
+module.exports = function parseLinkTitle(str, pos, max) {
+  var code,
+      marker,
+      lines = 0,
+      start = pos,
+      result = {
+        ok: false,
+        pos: 0,
+        lines: 0,
+        str: ''
+      };
+
+  if (pos >= max) { return result; }
+
+  marker = str.charCodeAt(pos);
+
+  if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return result; }
+
+  pos++;
+
+  // if opening marker is "(", switch it to closing marker ")"
+  if (marker === 0x28) { marker = 0x29; }
+
+  while (pos < max) {
+    code = str.charCodeAt(pos);
+    if (code === marker) {
+      result.pos = pos + 1;
+      result.lines = lines;
+      result.str = unescapeAll(str.slice(start + 1, pos));
+      result.ok = true;
+      return result;
+    } else if (code === 0x0A) {
+      lines++;
+    } else if (code === 0x5C /* \ */ && pos + 1 < max) {
+      pos++;
+      if (str.charCodeAt(pos) === 0x0A) {
+        lines++;
+      }
+    }
+
+    pos++;
+  }
+
+  return result;
+};
+
+},{"../common/utils":32}],37:[function(require,module,exports){
+// Main perser class
+
+'use strict';
+
+
+var utils        = require('./common/utils');
+var helpers      = require('./helpers');
+var Renderer     = require('./renderer');
+var ParserCore   = require('./parser_core');
+var ParserBlock  = require('./parser_block');
+var ParserInline = require('./parser_inline');
+var LinkifyIt    = require('linkify-it');
+var mdurl        = require('mdurl');
+var punycode     = require('punycode');
+
+
+var config = {
+  'default': require('./presets/default'),
+  zero: require('./presets/zero'),
+  commonmark: require('./presets/commonmark')
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// This validator can prohibit more than really needed to prevent XSS. It's a
+// tradeoff to keep code simple and to be secure by default.
+//
+// If you need different setup - override validator method as you wish. Or
+// replace it with dummy function and use external sanitizer.
+//
+
+var BAD_PROTO_RE = /^(vbscript|javascript|file|data):/;
+var GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;
+
+function validateLink(url) {
+  // url should be normalized at this point, and existing entities are decoded
+  var str = url.trim().toLowerCase();
+
+  return BAD_PROTO_RE.test(str) ? (GOOD_DATA_RE.test(str) ? true : false) : true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+
+var RECODE_HOSTNAME_FOR = [ 'http:', 'https:', 'mailto:' ];
+
+function normalizeLink(url) {
+  var parsed = mdurl.parse(url, true);
+
+  if (parsed.hostname) {
+    // Encode hostnames in urls like:
+    // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
+    //
+    // We don't encode unknown schemas, because it's likely that we encode
+    // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
+    //
+    if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
+      try {
+        parsed.hostname = punycode.toASCII(parsed.hostname);
+      } catch (er) { /**/ }
+    }
+  }
+
+  return mdurl.encode(mdurl.format(parsed));
+}
+
+function normalizeLinkText(url) {
+  var parsed = mdurl.parse(url, true);
+
+  if (parsed.hostname) {
+    // Encode hostnames in urls like:
+    // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
+    //
+    // We don't encode unknown schemas, because it's likely that we encode
+    // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
+    //
+    if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
+      try {
+        parsed.hostname = punycode.toUnicode(parsed.hostname);
+      } catch (er) { /**/ }
+    }
+  }
+
+  return mdurl.decode(mdurl.format(parsed));
+}
+
+
+/**
+ * class MarkdownIt
+ *
+ * Main parser/renderer class.
+ *
+ * ##### Usage
+ *
+ * ```javascript
+ * // node.js, "classic" way:
+ * var MarkdownIt = require('markdown-it'),
+ *     md = new MarkdownIt();
+ * var result = md.render('# markdown-it rulezz!');
+ *
+ * // node.js, the same, but with sugar:
+ * var md = require('markdown-it')();
+ * var result = md.render('# markdown-it rulezz!');
+ *
+ * // browser without AMD, added to "window" on script load
+ * // Note, there are no dash.
+ * var md = window.markdownit();
+ * var result = md.render('# markdown-it rulezz!');
+ * ```
+ *
+ * Single line rendering, without paragraph wrap:
+ *
+ * ```javascript
+ * var md = require('markdown-it')();
+ * var result = md.renderInline('__markdown-it__ rulezz!');
+ * ```
+ **/
+
+/**
+ * new MarkdownIt([presetName, options])
+ * - presetName (String): optional, `commonmark` / `zero`
+ * - options (Object)
+ *
+ * Creates parser instanse with given config. Can be called without `new`.
+ *
+ * ##### presetName
+ *
+ * MarkdownIt provides named presets as a convenience to quickly
+ * enable/disable active syntax rules and options for common use cases.
+ *
+ * - ["commonmark"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/commonmark.js) -
+ *   configures parser to strict [CommonMark](http://commonmark.org/) mode.
+ * - [default](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/default.js) -
+ *   similar to GFM, used when no preset name given. Enables all available rules,
+ *   but still without html, typographer & autolinker.
+ * - ["zero"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/zero.js) -
+ *   all rules disabled. Useful to quickly setup your config via `.enable()`.
+ *   For example, when you need only `bold` and `italic` markup and nothing else.
+ *
+ * ##### options:
+ *
+ * - __html__ - `false`. Set `true` to enable HTML tags in source. Be careful!
+ *   That's not safe! You may need external sanitizer to protect output from XSS.
+ *   It's better to extend features via plugins, instead of enabling HTML.
+ * - __xhtmlOut__ - `false`. Set `true` to add '/' when closing single tags
+ *   (`<br />`). This is needed only for full CommonMark compatibility. In real
+ *   world you will need HTML output.
+ * - __breaks__ - `false`. Set `true` to convert `\n` in paragraphs into `<br>`.
+ * - __langPrefix__ - `language-`. CSS language class prefix for fenced blocks.
+ *   Can be useful for external highlighters.
+ * - __linkify__ - `false`. Set `true` to autoconvert URL-like text to links.
+ * - __typographer__  - `false`. Set `true` to enable [some language-neutral
+ *   replacement](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.js) +
+ *   quotes beautification (smartquotes).
+ * - __quotes__ - `“”‘’`, String or Array. Double + single quotes replacement
+ *   pairs, when typographer enabled and smartquotes on. For example, you can
+ *   use `'«»„“'` for Russian, `'„“‚‘'` for German, and
+ *   `['«\xA0', '\xA0»', '‹\xA0', '\xA0›']` for French (including nbsp).
+ * - __highlight__ - `null`. Highlighter function for fenced code blocks.
+ *   Highlighter `function (str, lang)` should return escaped HTML. It can also
+ *   return empty string if the source was not changed and should be escaped
+ *   externaly. If result starts with <pre... internal wrapper is skipped.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * // commonmark mode
+ * var md = require('markdown-it')('commonmark');
+ *
+ * // default mode
+ * var md = require('markdown-it')();
+ *
+ * // enable everything
+ * var md = require('markdown-it')({
+ *   html: true,
+ *   linkify: true,
+ *   typographer: true
+ * });
+ * ```
+ *
+ * ##### Syntax highlighting
+ *
+ * ```js
+ * var hljs = require('highlight.js') // https://highlightjs.org/
+ *
+ * var md = require('markdown-it')({
+ *   highlight: function (str, lang) {
+ *     if (lang && hljs.getLanguage(lang)) {
+ *       try {
+ *         return hljs.highlight(lang, str, true).value;
+ *       } catch (__) {}
+ *     }
+ *
+ *     return ''; // use external default escaping
+ *   }
+ * });
+ * ```
+ *
+ * Or with full wrapper override (if you need assign class to `<pre>`):
+ *
+ * ```javascript
+ * var hljs = require('highlight.js') // https://highlightjs.org/
+ *
+ * // Actual default values
+ * var md = require('markdown-it')({
+ *   highlight: function (str, lang) {
+ *     if (lang && hljs.getLanguage(lang)) {
+ *       try {
+ *         return '<pre class="hljs"><code>' +
+ *                hljs.highlight(lang, str, true).value +
+ *                '</code></pre>';
+ *       } catch (__) {}
+ *     }
+ *
+ *     return '<pre class="hljs"><code>' + md.utils.escapeHtml(str) + '</code></pre>';
+ *   }
+ * });
+ * ```
+ *
+ **/
+function MarkdownIt(presetName, options) {
+  if (!(this instanceof MarkdownIt)) {
+    return new MarkdownIt(presetName, options);
+  }
+
+  if (!options) {
+    if (!utils.isString(presetName)) {
+      options = presetName || {};
+      presetName = 'default';
+    }
+  }
+
+  /**
+   * MarkdownIt#inline -> ParserInline
+   *
+   * Instance of [[ParserInline]]. You may need it to add new rules when
+   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
+   * [[MarkdownIt.enable]].
+   **/
+  this.inline = new ParserInline();
+
+  /**
+   * MarkdownIt#block -> ParserBlock
+   *
+   * Instance of [[ParserBlock]]. You may need it to add new rules when
+   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
+   * [[MarkdownIt.enable]].
+   **/
+  this.block = new ParserBlock();
+
+  /**
+   * MarkdownIt#core -> Core
+   *
+   * Instance of [[Core]] chain executor. You may need it to add new rules when
+   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
+   * [[MarkdownIt.enable]].
+   **/
+  this.core = new ParserCore();
+
+  /**
+   * MarkdownIt#renderer -> Renderer
+   *
+   * Instance of [[Renderer]]. Use it to modify output look. Or to add rendering
+   * rules for new token types, generated by plugins.
+   *
+   * ##### Example
+   *
+   * ```javascript
+   * var md = require('markdown-it')();
+   *
+   * function myToken(tokens, idx, options, env, self) {
+   *   //...
+   *   return result;
+   * };
+   *
+   * md.renderer.rules['my_token'] = myToken
+   * ```
+   *
+   * See [[Renderer]] docs and [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.js).
+   **/
+  this.renderer = new Renderer();
+
+  /**
+   * MarkdownIt#linkify -> LinkifyIt
+   *
+   * [linkify-it](https://github.com/markdown-it/linkify-it) instance.
+   * Used by [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.js)
+   * rule.
+   **/
+  this.linkify = new LinkifyIt();
+
+  /**
+   * MarkdownIt#validateLink(url) -> Boolean
+   *
+   * Link validation function. CommonMark allows too much in links. By default
+   * we disable `javascript:`, `vbscript:`, `file:` schemas, and almost all `data:...` schemas
+   * except some embedded image types.
+   *
+   * You can change this behaviour:
+   *
+   * ```javascript
+   * var md = require('markdown-it')();
+   * // enable everything
+   * md.validateLink = function () { return true; }
+   * ```
+   **/
+  this.validateLink = validateLink;
+
+  /**
+   * MarkdownIt#normalizeLink(url) -> String
+   *
+   * Function used to encode link url to a machine-readable format,
+   * which includes url-encoding, punycode, etc.
+   **/
+  this.normalizeLink = normalizeLink;
+
+  /**
+   * MarkdownIt#normalizeLinkText(url) -> String
+   *
+   * Function used to decode link url to a human-readable format`
+   **/
+  this.normalizeLinkText = normalizeLinkText;
+
+
+  // Expose utils & helpers for easy acces from plugins
+
+  /**
+   * MarkdownIt#utils -> utils
+   *
+   * Assorted utility functions, useful to write plugins. See details
+   * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/common/utils.js).
+   **/
+  this.utils = utils;
+
+  /**
+   * MarkdownIt#helpers -> helpers
+   *
+   * Link components parser functions, useful to write plugins. See details
+   * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/helpers).
+   **/
+  this.helpers = helpers;
+
+
+  this.options = {};
+  this.configure(presetName);
+
+  if (options) { this.set(options); }
+}
+
+
+/** chainable
+ * MarkdownIt.set(options)
+ *
+ * Set parser options (in the same format as in constructor). Probably, you
+ * will never need it, but you can change options after constructor call.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var md = require('markdown-it')()
+ *             .set({ html: true, breaks: true })
+ *             .set({ typographer, true });
+ * ```
+ *
+ * __Note:__ To achieve the best possible performance, don't modify a
+ * `markdown-it` instance options on the fly. If you need multiple configurations
+ * it's best to create multiple instances and initialize each with separate
+ * config.
+ **/
+MarkdownIt.prototype.set = function (options) {
+  utils.assign(this.options, options);
+  return this;
+};
+
+
+/** chainable, internal
+ * MarkdownIt.configure(presets)
+ *
+ * Batch load of all options and compenent settings. This is internal method,
+ * and you probably will not need it. But if you with - see available presets
+ * and data structure [here](https://github.com/markdown-it/markdown-it/tree/master/lib/presets)
+ *
+ * We strongly recommend to use presets instead of direct config loads. That
+ * will give better compatibility with next versions.
+ **/
+MarkdownIt.prototype.configure = function (presets) {
+  var self = this, presetName;
+
+  if (utils.isString(presets)) {
+    presetName = presets;
+    presets = config[presetName];
+    if (!presets) { throw new Error('Wrong `markdown-it` preset "' + presetName + '", check name'); }
+  }
+
+  if (!presets) { throw new Error('Wrong `markdown-it` preset, can\'t be empty'); }
+
+  if (presets.options) { self.set(presets.options); }
+
+  if (presets.components) {
+    Object.keys(presets.components).forEach(function (name) {
+      if (presets.components[name].rules) {
+        self[name].ruler.enableOnly(presets.components[name].rules);
+      }
+      if (presets.components[name].rules2) {
+        self[name].ruler2.enableOnly(presets.components[name].rules2);
+      }
+    });
+  }
+  return this;
+};
+
+
+/** chainable
+ * MarkdownIt.enable(list, ignoreInvalid)
+ * - list (String|Array): rule name or list of rule names to enable
+ * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
+ *
+ * Enable list or rules. It will automatically find appropriate components,
+ * containing rules with given names. If rule not found, and `ignoreInvalid`
+ * not set - throws exception.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var md = require('markdown-it')()
+ *             .enable(['sub', 'sup'])
+ *             .disable('smartquotes');
+ * ```
+ **/
+MarkdownIt.prototype.enable = function (list, ignoreInvalid) {
+  var result = [];
+
+  if (!Array.isArray(list)) { list = [ list ]; }
+
+  [ 'core', 'block', 'inline' ].forEach(function (chain) {
+    result = result.concat(this[chain].ruler.enable(list, true));
+  }, this);
+
+  result = result.concat(this.inline.ruler2.enable(list, true));
+
+  var missed = list.filter(function (name) { return result.indexOf(name) < 0; });
+
+  if (missed.length && !ignoreInvalid) {
+    throw new Error('MarkdownIt. Failed to enable unknown rule(s): ' + missed);
+  }
+
+  return this;
+};
+
+
+/** chainable
+ * MarkdownIt.disable(list, ignoreInvalid)
+ * - list (String|Array): rule name or list of rule names to disable.
+ * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
+ *
+ * The same as [[MarkdownIt.enable]], but turn specified rules off.
+ **/
+MarkdownIt.prototype.disable = function (list, ignoreInvalid) {
+  var result = [];
+
+  if (!Array.isArray(list)) { list = [ list ]; }
+
+  [ 'core', 'block', 'inline' ].forEach(function (chain) {
+    result = result.concat(this[chain].ruler.disable(list, true));
+  }, this);
+
+  result = result.concat(this.inline.ruler2.disable(list, true));
+
+  var missed = list.filter(function (name) { return result.indexOf(name) < 0; });
+
+  if (missed.length && !ignoreInvalid) {
+    throw new Error('MarkdownIt. Failed to disable unknown rule(s): ' + missed);
+  }
+  return this;
+};
+
+
+/** chainable
+ * MarkdownIt.use(plugin, params)
+ *
+ * Load specified plugin with given params into current parser instance.
+ * It's just a sugar to call `plugin(md, params)` with curring.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var iterator = require('markdown-it-for-inline');
+ * var md = require('markdown-it')()
+ *             .use(iterator, 'foo_replace', 'text', function (tokens, idx) {
+ *               tokens[idx].content = tokens[idx].content.replace(/foo/g, 'bar');
+ *             });
+ * ```
+ **/
+MarkdownIt.prototype.use = function (plugin /*, params, ... */) {
+  var args = [ this ].concat(Array.prototype.slice.call(arguments, 1));
+  plugin.apply(plugin, args);
+  return this;
+};
+
+
+/** internal
+ * MarkdownIt.parse(src, env) -> Array
+ * - src (String): source string
+ * - env (Object): environment sandbox
+ *
+ * Parse input string and returns list of block tokens (special token type
+ * "inline" will contain list of inline tokens). You should not call this
+ * method directly, until you write custom renderer (for example, to produce
+ * AST).
+ *
+ * `env` is used to pass data between "distributed" rules and return additional
+ * metadata like reference info, needed for the renderer. It also can be used to
+ * inject data in specific cases. Usually, you will be ok to pass `{}`,
+ * and then pass updated object to renderer.
+ **/
+MarkdownIt.prototype.parse = function (src, env) {
+  var state = new this.core.State(src, this, env);
+
+  this.core.process(state);
+
+  return state.tokens;
+};
+
+
+/**
+ * MarkdownIt.render(src [, env]) -> String
+ * - src (String): source string
+ * - env (Object): environment sandbox
+ *
+ * Render markdown string into html. It does all magic for you :).
+ *
+ * `env` can be used to inject additional metadata (`{}` by default).
+ * But you will not need it with high probability. See also comment
+ * in [[MarkdownIt.parse]].
+ **/
+MarkdownIt.prototype.render = function (src, env) {
+  env = env || {};
+
+  return this.renderer.render(this.parse(src, env), this.options, env);
+};
+
+
+/** internal
+ * MarkdownIt.parseInline(src, env) -> Array
+ * - src (String): source string
+ * - env (Object): environment sandbox
+ *
+ * The same as [[MarkdownIt.parse]] but skip all block rules. It returns the
+ * block tokens list with the single `inline` element, containing parsed inline
+ * tokens in `children` property. Also updates `env` object.
+ **/
+MarkdownIt.prototype.parseInline = function (src, env) {
+  var state = new this.core.State(src, this, env);
+
+  state.inlineMode = true;
+  this.core.process(state);
+
+  return state.tokens;
+};
+
+
+/**
+ * MarkdownIt.renderInline(src [, env]) -> String
+ * - src (String): source string
+ * - env (Object): environment sandbox
+ *
+ * Similar to [[MarkdownIt.render]] but for single paragraph content. Result
+ * will NOT be wrapped into `<p>` tags.
+ **/
+MarkdownIt.prototype.renderInline = function (src, env) {
+  env = env || {};
+
+  return this.renderer.render(this.parseInline(src, env), this.options, env);
+};
+
+
+module.exports = MarkdownIt;
+
+},{"./common/utils":32,"./helpers":33,"./parser_block":38,"./parser_core":39,"./parser_inline":40,"./presets/commonmark":41,"./presets/default":42,"./presets/zero":43,"./renderer":44,"linkify-it":26,"mdurl":84,"punycode":92}],38:[function(require,module,exports){
+/** internal
+ * class ParserBlock
+ *
+ * Block-level tokenizer.
+ **/
+'use strict';
+
+
+var Ruler           = require('./ruler');
+
+
+var _rules = [
+  // First 2 params - rule name & source. Secondary array - list of rules,
+  // which can be terminated by this one.
+  [ 'table',      require('./rules_block/table'),      [ 'paragraph', 'reference' ] ],
+  [ 'code',       require('./rules_block/code') ],
+  [ 'fence',      require('./rules_block/fence'),      [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
+  [ 'blockquote', require('./rules_block/blockquote'), [ 'paragraph', 'reference', 'list' ] ],
+  [ 'hr',         require('./rules_block/hr'),         [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
+  [ 'list',       require('./rules_block/list'),       [ 'paragraph', 'reference', 'blockquote' ] ],
+  [ 'reference',  require('./rules_block/reference') ],
+  [ 'heading',    require('./rules_block/heading'),    [ 'paragraph', 'reference', 'blockquote' ] ],
+  [ 'lheading',   require('./rules_block/lheading') ],
+  [ 'html_block', require('./rules_block/html_block'), [ 'paragraph', 'reference', 'blockquote' ] ],
+  [ 'paragraph',  require('./rules_block/paragraph') ]
+];
+
+
+/**
+ * new ParserBlock()
+ **/
+function ParserBlock() {
+  /**
+   * ParserBlock#ruler -> Ruler
+   *
+   * [[Ruler]] instance. Keep configuration of block rules.
+   **/
+  this.ruler = new Ruler();
+
+  for (var i = 0; i < _rules.length; i++) {
+    this.ruler.push(_rules[i][0], _rules[i][1], { alt: (_rules[i][2] || []).slice() });
+  }
+}
+
+
+// Generate tokens for input range
+//
+ParserBlock.prototype.tokenize = function (state, startLine, endLine) {
+  var ok, i,
+      rules = this.ruler.getRules(''),
+      len = rules.length,
+      line = startLine,
+      hasEmptyLines = false,
+      maxNesting = state.md.options.maxNesting;
+
+  while (line < endLine) {
+    state.line = line = state.skipEmptyLines(line);
+    if (line >= endLine) { break; }
+
+    // Termination condition for nested calls.
+    // Nested calls currently used for blockquotes & lists
+    if (state.sCount[line] < state.blkIndent) { break; }
+
+    // If nesting level exceeded - skip tail to the end. That's not ordinary
+    // situation and we should not care about content.
+    if (state.level >= maxNesting) {
+      state.line = endLine;
+      break;
+    }
+
+    // Try all possible rules.
+    // On success, rule should:
+    //
+    // - update `state.line`
+    // - update `state.tokens`
+    // - return true
+
+    for (i = 0; i < len; i++) {
+      ok = rules[i](state, line, endLine, false);
+      if (ok) { break; }
+    }
+
+    // set state.tight iff we had an empty line before current tag
+    // i.e. latest empty line should not count
+    state.tight = !hasEmptyLines;
+
+    // paragraph might "eat" one newline after it in nested lists
+    if (state.isEmpty(state.line - 1)) {
+      hasEmptyLines = true;
+    }
+
+    line = state.line;
+
+    if (line < endLine && state.isEmpty(line)) {
+      hasEmptyLines = true;
+      line++;
+
+      // two empty lines should stop the parser in list mode
+      if (line < endLine && state.parentType === 'list' && state.isEmpty(line)) { break; }
+      state.line = line;
+    }
+  }
+};
+
+
+/**
+ * ParserBlock.parse(str, md, env, outTokens)
+ *
+ * Process input string and push block tokens into `outTokens`
+ **/
+ParserBlock.prototype.parse = function (src, md, env, outTokens) {
+  var state;
+
+  if (!src) { return []; }
+
+  state = new this.State(src, md, env, outTokens);
+
+  this.tokenize(state, state.line, state.lineMax);
+};
+
+
+ParserBlock.prototype.State = require('./rules_block/state_block');
+
+
+module.exports = ParserBlock;
+
+},{"./ruler":45,"./rules_block/blockquote":46,"./rules_block/code":47,"./rules_block/fence":48,"./rules_block/heading":49,"./rules_block/hr":50,"./rules_block/html_block":51,"./rules_block/lheading":52,"./rules_block/list":53,"./rules_block/paragraph":54,"./rules_block/reference":55,"./rules_block/state_block":56,"./rules_block/table":57}],39:[function(require,module,exports){
+/** internal
+ * class Core
+ *
+ * Top-level rules executor. Glues block/inline parsers and does intermediate
+ * transformations.
+ **/
+'use strict';
+
+
+var Ruler  = require('./ruler');
+
+
+var _rules = [
+  [ 'normalize',      require('./rules_core/normalize')      ],
+  [ 'block',          require('./rules_core/block')          ],
+  [ 'inline',         require('./rules_core/inline')         ],
+  [ 'linkify',        require('./rules_core/linkify')        ],
+  [ 'replacements',   require('./rules_core/replacements')   ],
+  [ 'smartquotes',    require('./rules_core/smartquotes')    ]
+];
+
+
+/**
+ * new Core()
+ **/
+function Core() {
+  /**
+   * Core#ruler -> Ruler
+   *
+   * [[Ruler]] instance. Keep configuration of core rules.
+   **/
+  this.ruler = new Ruler();
+
+  for (var i = 0; i < _rules.length; i++) {
+    this.ruler.push(_rules[i][0], _rules[i][1]);
+  }
+}
+
+
+/**
+ * Core.process(state)
+ *
+ * Executes core chain rules.
+ **/
+Core.prototype.process = function (state) {
+  var i, l, rules;
+
+  rules = this.ruler.getRules('');
+
+  for (i = 0, l = rules.length; i < l; i++) {
+    rules[i](state);
+  }
+};
+
+Core.prototype.State = require('./rules_core/state_core');
+
+
+module.exports = Core;
+
+},{"./ruler":45,"./rules_core/block":58,"./rules_core/inline":59,"./rules_core/linkify":60,"./rules_core/normalize":61,"./rules_core/replacements":62,"./rules_core/smartquotes":63,"./rules_core/state_core":64}],40:[function(require,module,exports){
+/** internal
+ * class ParserInline
+ *
+ * Tokenizes paragraph content.
+ **/
+'use strict';
+
+
+var Ruler           = require('./ruler');
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Parser rules
+
+var _rules = [
+  [ 'text',            require('./rules_inline/text') ],
+  [ 'newline',         require('./rules_inline/newline') ],
+  [ 'escape',          require('./rules_inline/escape') ],
+  [ 'backticks',       require('./rules_inline/backticks') ],
+  [ 'strikethrough',   require('./rules_inline/strikethrough').tokenize ],
+  [ 'emphasis',        require('./rules_inline/emphasis').tokenize ],
+  [ 'link',            require('./rules_inline/link') ],
+  [ 'image',           require('./rules_inline/image') ],
+  [ 'autolink',        require('./rules_inline/autolink') ],
+  [ 'html_inline',     require('./rules_inline/html_inline') ],
+  [ 'entity',          require('./rules_inline/entity') ]
+];
+
+var _rules2 = [
+  [ 'balance_pairs',   require('./rules_inline/balance_pairs') ],
+  [ 'strikethrough',   require('./rules_inline/strikethrough').postProcess ],
+  [ 'emphasis',        require('./rules_inline/emphasis').postProcess ],
+  [ 'text_collapse',   require('./rules_inline/text_collapse') ]
+];
+
+
+/**
+ * new ParserInline()
+ **/
+function ParserInline() {
+  var i;
+
+  /**
+   * ParserInline#ruler -> Ruler
+   *
+   * [[Ruler]] instance. Keep configuration of inline rules.
+   **/
+  this.ruler = new Ruler();
+
+  for (i = 0; i < _rules.length; i++) {
+    this.ruler.push(_rules[i][0], _rules[i][1]);
+  }
+
+  /**
+   * ParserInline#ruler2 -> Ruler
+   *
+   * [[Ruler]] instance. Second ruler used for post-processing
+   * (e.g. in emphasis-like rules).
+   **/
+  this.ruler2 = new Ruler();
+
+  for (i = 0; i < _rules2.length; i++) {
+    this.ruler2.push(_rules2[i][0], _rules2[i][1]);
+  }
+}
+
+
+// Skip single token by running all rules in validation mode;
+// returns `true` if any rule reported success
+//
+ParserInline.prototype.skipToken = function (state) {
+  var ok, i, pos = state.pos,
+      rules = this.ruler.getRules(''),
+      len = rules.length,
+      maxNesting = state.md.options.maxNesting,
+      cache = state.cache;
+
+
+  if (typeof cache[pos] !== 'undefined') {
+    state.pos = cache[pos];
+    return;
+  }
+
+  if (state.level < maxNesting) {
+    for (i = 0; i < len; i++) {
+      // Increment state.level and decrement it later to limit recursion.
+      // It's harmless to do here, because no tokens are created. But ideally,
+      // we'd need a separate private state variable for this purpose.
+      //
+      state.level++;
+      ok = rules[i](state, true);
+      state.level--;
+
+      if (ok) { break; }
+    }
+  } else {
+    // Too much nesting, just skip until the end of the paragraph.
+    //
+    // NOTE: this will cause links to behave incorrectly in the following case,
+    //       when an amount of `[` is exactly equal to `maxNesting + 1`:
+    //
+    //       [[[[[[[[[[[[[[[[[[[[[foo]()
+    //
+    // TODO: remove this workaround when CM standard will allow nested links
+    //       (we can replace it by preventing links from being parsed in
+    //       validation mode)
+    //
+    state.pos = state.posMax;
+  }
+
+  if (!ok) { state.pos++; }
+  cache[pos] = state.pos;
+};
+
+
+// Generate tokens for input range
+//
+ParserInline.prototype.tokenize = function (state) {
+  var ok, i,
+      rules = this.ruler.getRules(''),
+      len = rules.length,
+      end = state.posMax,
+      maxNesting = state.md.options.maxNesting;
+
+  while (state.pos < end) {
+    // Try all possible rules.
+    // On success, rule should:
+    //
+    // - update `state.pos`
+    // - update `state.tokens`
+    // - return true
+
+    if (state.level < maxNesting) {
+      for (i = 0; i < len; i++) {
+        ok = rules[i](state, false);
+        if (ok) { break; }
+      }
+    }
+
+    if (ok) {
+      if (state.pos >= end) { break; }
+      continue;
+    }
+
+    state.pending += state.src[state.pos++];
+  }
+
+  if (state.pending) {
+    state.pushPending();
+  }
+};
+
+
+/**
+ * ParserInline.parse(str, md, env, outTokens)
+ *
+ * Process input string and push inline tokens into `outTokens`
+ **/
+ParserInline.prototype.parse = function (str, md, env, outTokens) {
+  var i, rules, len;
+  var state = new this.State(str, md, env, outTokens);
+
+  this.tokenize(state);
+
+  rules = this.ruler2.getRules('');
+  len = rules.length;
+
+  for (i = 0; i < len; i++) {
+    rules[i](state);
+  }
+};
+
+
+ParserInline.prototype.State = require('./rules_inline/state_inline');
+
+
+module.exports = ParserInline;
+
+},{"./ruler":45,"./rules_inline/autolink":65,"./rules_inline/backticks":66,"./rules_inline/balance_pairs":67,"./rules_inline/emphasis":68,"./rules_inline/entity":69,"./rules_inline/escape":70,"./rules_inline/html_inline":71,"./rules_inline/image":72,"./rules_inline/link":73,"./rules_inline/newline":74,"./rules_inline/state_inline":75,"./rules_inline/strikethrough":76,"./rules_inline/text":77,"./rules_inline/text_collapse":78}],41:[function(require,module,exports){
+// Commonmark default options
+
+'use strict';
+
+
+module.exports = {
+  options: {
+    html:         true,         // Enable HTML tags in source
+    xhtmlOut:     true,         // Use '/' to close single tags (<br />)
+    breaks:       false,        // Convert '\n' in paragraphs into <br>
+    langPrefix:   'language-',  // CSS language prefix for fenced blocks
+    linkify:      false,        // autoconvert URL-like texts to links
+
+    // Enable some language-neutral replacements + quotes beautification
+    typographer:  false,
+
+    // Double + single quotes replacement pairs, when typographer enabled,
+    // and smartquotes on. Could be either a String or an Array.
+    //
+    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
+    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
+    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */
+
+    // Highlighter function. Should return escaped HTML,
+    // or '' if the source string is not changed and should be escaped externaly.
+    // If result starts with <pre... internal wrapper is skipped.
+    //
+    // function (/*str, lang*/) { return ''; }
+    //
+    highlight: null,
+
+    maxNesting:   20            // Internal protection, recursion limit
+  },
+
+  components: {
+
+    core: {
+      rules: [
+        'normalize',
+        'block',
+        'inline'
+      ]
+    },
+
+    block: {
+      rules: [
+        'blockquote',
+        'code',
+        'fence',
+        'heading',
+        'hr',
+        'html_block',
+        'lheading',
+        'list',
+        'reference',
+        'paragraph'
+      ]
+    },
+
+    inline: {
+      rules: [
+        'autolink',
+        'backticks',
+        'emphasis',
+        'entity',
+        'escape',
+        'html_inline',
+        'image',
+        'link',
+        'newline',
+        'text'
+      ],
+      rules2: [
+        'balance_pairs',
+        'emphasis',
+        'text_collapse'
+      ]
+    }
+  }
+};
+
+},{}],42:[function(require,module,exports){
+// markdown-it default options
+
+'use strict';
+
+
+module.exports = {
+  options: {
+    html:         false,        // Enable HTML tags in source
+    xhtmlOut:     false,        // Use '/' to close single tags (<br />)
+    breaks:       false,        // Convert '\n' in paragraphs into <br>
+    langPrefix:   'language-',  // CSS language prefix for fenced blocks
+    linkify:      false,        // autoconvert URL-like texts to links
+
+    // Enable some language-neutral replacements + quotes beautification
+    typographer:  false,
+
+    // Double + single quotes replacement pairs, when typographer enabled,
+    // and smartquotes on. Could be either a String or an Array.
+    //
+    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
+    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
+    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */
+
+    // Highlighter function. Should return escaped HTML,
+    // or '' if the source string is not changed and should be escaped externaly.
+    // If result starts with <pre... internal wrapper is skipped.
+    //
+    // function (/*str, lang*/) { return ''; }
+    //
+    highlight: null,
+
+    maxNesting:   100            // Internal protection, recursion limit
+  },
+
+  components: {
+
+    core: {},
+    block: {},
+    inline: {}
+  }
+};
+
+},{}],43:[function(require,module,exports){
+// "Zero" preset, with nothing enabled. Useful for manual configuring of simple
+// modes. For example, to parse bold/italic only.
+
+'use strict';
+
+
+module.exports = {
+  options: {
+    html:         false,        // Enable HTML tags in source
+    xhtmlOut:     false,        // Use '/' to close single tags (<br />)
+    breaks:       false,        // Convert '\n' in paragraphs into <br>
+    langPrefix:   'language-',  // CSS language prefix for fenced blocks
+    linkify:      false,        // autoconvert URL-like texts to links
+
+    // Enable some language-neutral replacements + quotes beautification
+    typographer:  false,
+
+    // Double + single quotes replacement pairs, when typographer enabled,
+    // and smartquotes on. Could be either a String or an Array.
+    //
+    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
+    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
+    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */
+
+    // Highlighter function. Should return escaped HTML,
+    // or '' if the source string is not changed and should be escaped externaly.
+    // If result starts with <pre... internal wrapper is skipped.
+    //
+    // function (/*str, lang*/) { return ''; }
+    //
+    highlight: null,
+
+    maxNesting:   20            // Internal protection, recursion limit
+  },
+
+  components: {
+
+    core: {
+      rules: [
+        'normalize',
+        'block',
+        'inline'
+      ]
+    },
+
+    block: {
+      rules: [
+        'paragraph'
+      ]
+    },
+
+    inline: {
+      rules: [
+        'text'
+      ],
+      rules2: [
+        'balance_pairs',
+        'text_collapse'
+      ]
+    }
+  }
+};
+
+},{}],44:[function(require,module,exports){
+/**
+ * class Renderer
+ *
+ * Generates HTML from parsed token stream. Each instance has independent
+ * copy of rules. Those can be rewritten with ease. Also, you can add new
+ * rules if you create plugin and adds new token types.
+ **/
+'use strict';
+
+
+var assign          = require('./common/utils').assign;
+var unescapeAll     = require('./common/utils').unescapeAll;
+var escapeHtml      = require('./common/utils').escapeHtml;
+
+
+////////////////////////////////////////////////////////////////////////////////
+
+var default_rules = {};
+
+
+default_rules.code_inline = function (tokens, idx /*, options, env */) {
+  return '<code>' + escapeHtml(tokens[idx].content) + '</code>';
+};
+
+
+default_rules.code_block = function (tokens, idx /*, options, env */) {
+  return '<pre><code>' + escapeHtml(tokens[idx].content) + '</code></pre>\n';
+};
+
+
+default_rules.fence = function (tokens, idx, options, env, slf) {
+  var token = tokens[idx],
+      info = token.info ? unescapeAll(token.info).trim() : '',
+      langName = '',
+      highlighted;
+
+  if (info) {
+    langName = info.split(/\s+/g)[0];
+    token.attrJoin('class', options.langPrefix + langName);
+  }
+
+  if (options.highlight) {
+    highlighted = options.highlight(token.content, langName) || escapeHtml(token.content);
+  } else {
+    highlighted = escapeHtml(token.content);
+  }
+
+  if (highlighted.indexOf('<pre') === 0) {
+    return highlighted + '\n';
+  }
+
+  return  '<pre><code' + slf.renderAttrs(token) + '>'
+        + highlighted
+        + '</code></pre>\n';
+};
+
+
+default_rules.image = function (tokens, idx, options, env, slf) {
+  var token = tokens[idx];
+
+  // "alt" attr MUST be set, even if empty. Because it's mandatory and
+  // should be placed on proper position for tests.
+  //
+  // Replace content with actual value
+
+  token.attrs[token.attrIndex('alt')][1] =
+    slf.renderInlineAsText(token.children, options, env);
+
+  return slf.renderToken(tokens, idx, options);
+};
+
+
+default_rules.hardbreak = function (tokens, idx, options /*, env */) {
+  return options.xhtmlOut ? '<br />\n' : '<br>\n';
+};
+default_rules.softbreak = function (tokens, idx, options /*, env */) {
+  return options.breaks ? (options.xhtmlOut ? '<br />\n' : '<br>\n') : '\n';
+};
+
+
+default_rules.text = function (tokens, idx /*, options, env */) {
+  return escapeHtml(tokens[idx].content);
+};
+
+
+default_rules.html_block = function (tokens, idx /*, options, env */) {
+  return tokens[idx].content;
+};
+default_rules.html_inline = function (tokens, idx /*, options, env */) {
+  return tokens[idx].content;
+};
+
+
+/**
+ * new Renderer()
+ *
+ * Creates new [[Renderer]] instance and fill [[Renderer#rules]] with defaults.
+ **/
+function Renderer() {
+
+  /**
+   * Renderer#rules -> Object
+   *
+   * Contains render rules for tokens. Can be updated and extended.
+   *
+   * ##### Example
+   *
+   * ```javascript
+   * var md = require('markdown-it')();
+   *
+   * md.renderer.rules.strong_open  = function () { return '<b>'; };
+   * md.renderer.rules.strong_close = function () { return '</b>'; };
+   *
+   * var result = md.renderInline(...);
+   * ```
+   *
+   * Each rule is called as independed static function with fixed signature:
+   *
+   * ```javascript
+   * function my_token_render(tokens, idx, options, env, renderer) {
+   *   // ...
+   *   return renderedHTML;
+   * }
+   * ```
+   *
+   * See [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.js)
+   * for more details and examples.
+   **/
+  this.rules = assign({}, default_rules);
+}
+
+
+/**
+ * Renderer.renderAttrs(token) -> String
+ *
+ * Render token attributes to string.
+ **/
+Renderer.prototype.renderAttrs = function renderAttrs(token) {
+  var i, l, result;
+
+  if (!token.attrs) { return ''; }
+
+  result = '';
+
+  for (i = 0, l = token.attrs.length; i < l; i++) {
+    result += ' ' + escapeHtml(token.attrs[i][0]) + '="' + escapeHtml(token.attrs[i][1]) + '"';
+  }
+
+  return result;
+};
+
+
+/**
+ * Renderer.renderToken(tokens, idx, options) -> String
+ * - tokens (Array): list of tokens
+ * - idx (Numbed): token index to render
+ * - options (Object): params of parser instance
+ *
+ * Default token renderer. Can be overriden by custom function
+ * in [[Renderer#rules]].
+ **/
+Renderer.prototype.renderToken = function renderToken(tokens, idx, options) {
+  var nextToken,
+      result = '',
+      needLf = false,
+      token = tokens[idx];
+
+  // Tight list paragraphs
+  if (token.hidden) {
+    return '';
+  }
+
+  // Insert a newline between hidden paragraph and subsequent opening
+  // block-level tag.
+  //
+  // For example, here we should insert a newline before blockquote:
+  //  - a
+  //    >
+  //
+  if (token.block && token.nesting !== -1 && idx && tokens[idx - 1].hidden) {
+    result += '\n';
+  }
+
+  // Add token name, e.g. `<img`
+  result += (token.nesting === -1 ? '</' : '<') + token.tag;
+
+  // Encode attributes, e.g. `<img src="foo"`
+  result += this.renderAttrs(token);
+
+  // Add a slash for self-closing tags, e.g. `<img src="foo" /`
+  if (token.nesting === 0 && options.xhtmlOut) {
+    result += ' /';
+  }
+
+  // Check if we need to add a newline after this tag
+  if (token.block) {
+    needLf = true;
+
+    if (token.nesting === 1) {
+      if (idx + 1 < tokens.length) {
+        nextToken = tokens[idx + 1];
+
+        if (nextToken.type === 'inline' || nextToken.hidden) {
+          // Block-level tag containing an inline tag.
+          //
+          needLf = false;
+
+        } else if (nextToken.nesting === -1 && nextToken.tag === token.tag) {
+          // Opening tag + closing tag of the same type. E.g. `<li></li>`.
+          //
+          needLf = false;
+        }
+      }
+    }
+  }
+
+  result += needLf ? '>\n' : '>';
+
+  return result;
+};
+
+
+/**
+ * Renderer.renderInline(tokens, options, env) -> String
+ * - tokens (Array): list on block tokens to renter
+ * - options (Object): params of parser instance
+ * - env (Object): additional data from parsed input (references, for example)
+ *
+ * The same as [[Renderer.render]], but for single token of `inline` type.
+ **/
+Renderer.prototype.renderInline = function (tokens, options, env) {
+  var type,
+      result = '',
+      rules = this.rules;
+
+  for (var i = 0, len = tokens.length; i < len; i++) {
+    type = tokens[i].type;
+
+    if (typeof rules[type] !== 'undefined') {
+      result += rules[type](tokens, i, options, env, this);
+    } else {
+      result += this.renderToken(tokens, i, options);
+    }
+  }
+
+  return result;
+};
+
+
+/** internal
+ * Renderer.renderInlineAsText(tokens, options, env) -> String
+ * - tokens (Array): list on block tokens to renter
+ * - options (Object): params of parser instance
+ * - env (Object): additional data from parsed input (references, for example)
+ *
+ * Special kludge for image `alt` attributes to conform CommonMark spec.
+ * Don't try to use it! Spec requires to show `alt` content with stripped markup,
+ * instead of simple escaping.
+ **/
+Renderer.prototype.renderInlineAsText = function (tokens, options, env) {
+  var result = '',
+      rules = this.rules;
+
+  for (var i = 0, len = tokens.length; i < len; i++) {
+    if (tokens[i].type === 'text') {
+      result += rules.text(tokens, i, options, env, this);
+    } else if (tokens[i].type === 'image') {
+      result += this.renderInlineAsText(tokens[i].children, options, env);
+    }
+  }
+
+  return result;
+};
+
+
+/**
+ * Renderer.render(tokens, options, env) -> String
+ * - tokens (Array): list on block tokens to renter
+ * - options (Object): params of parser instance
+ * - env (Object): additional data from parsed input (references, for example)
+ *
+ * Takes token stream and generates HTML. Probably, you will never need to call
+ * this method directly.
+ **/
+Renderer.prototype.render = function (tokens, options, env) {
+  var i, len, type,
+      result = '',
+      rules = this.rules;
+
+  for (i = 0, len = tokens.length; i < len; i++) {
+    type = tokens[i].type;
+
+    if (type === 'inline') {
+      result += this.renderInline(tokens[i].children, options, env);
+    } else if (typeof rules[type] !== 'undefined') {
+      result += rules[tokens[i].type](tokens, i, options, env, this);
+    } else {
+      result += this.renderToken(tokens, i, options, env);
+    }
+  }
+
+  return result;
+};
+
+module.exports = Renderer;
+
+},{"./common/utils":32}],45:[function(require,module,exports){
+/**
+ * class Ruler
+ *
+ * Helper class, used by [[MarkdownIt#core]], [[MarkdownIt#block]] and
+ * [[MarkdownIt#inline]] to manage sequences of functions (rules):
+ *
+ * - keep rules in defined order
+ * - assign the name to each rule
+ * - enable/disable rules
+ * - add/replace rules
+ * - allow assign rules to additional named chains (in the same)
+ * - cacheing lists of active rules
+ *
+ * You will not need use this class directly until write plugins. For simple
+ * rules control use [[MarkdownIt.disable]], [[MarkdownIt.enable]] and
+ * [[MarkdownIt.use]].
+ **/
+'use strict';
+
+
+/**
+ * new Ruler()
+ **/
+function Ruler() {
+  // List of added rules. Each element is:
+  //
+  // {
+  //   name: XXX,
+  //   enabled: Boolean,
+  //   fn: Function(),
+  //   alt: [ name2, name3 ]
+  // }
+  //
+  this.__rules__ = [];
+
+  // Cached rule chains.
+  //
+  // First level - chain name, '' for default.
+  // Second level - diginal anchor for fast filtering by charcodes.
+  //
+  this.__cache__ = null;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Helper methods, should not be used directly
+
+
+// Find rule index by name
+//
+Ruler.prototype.__find__ = function (name) {
+  for (var i = 0; i < this.__rules__.length; i++) {
+    if (this.__rules__[i].name === name) {
+      return i;
+    }
+  }
+  return -1;
+};
+
+
+// Build rules lookup cache
+//
+Ruler.prototype.__compile__ = function () {
+  var self = this;
+  var chains = [ '' ];
+
+  // collect unique names
+  self.__rules__.forEach(function (rule) {
+    if (!rule.enabled) { return; }
+
+    rule.alt.forEach(function (altName) {
+      if (chains.indexOf(altName) < 0) {
+        chains.push(altName);
+      }
+    });
+  });
+
+  self.__cache__ = {};
+
+  chains.forEach(function (chain) {
+    self.__cache__[chain] = [];
+    self.__rules__.forEach(function (rule) {
+      if (!rule.enabled) { return; }
+
+      if (chain && rule.alt.indexOf(chain) < 0) { return; }
+
+      self.__cache__[chain].push(rule.fn);
+    });
+  });
+};
+
+
+/**
+ * Ruler.at(name, fn [, options])
+ * - name (String): rule name to replace.
+ * - fn (Function): new rule function.
+ * - options (Object): new rule options (not mandatory).
+ *
+ * Replace rule by name with new function & options. Throws error if name not
+ * found.
+ *
+ * ##### Options:
+ *
+ * - __alt__ - array with names of "alternate" chains.
+ *
+ * ##### Example
+ *
+ * Replace existing typorgapher replacement rule with new one:
+ *
+ * ```javascript
+ * var md = require('markdown-it')();
+ *
+ * md.core.ruler.at('replacements', function replace(state) {
+ *   //...
+ * });
+ * ```
+ **/
+Ruler.prototype.at = function (name, fn, options) {
+  var index = this.__find__(name);
+  var opt = options || {};
+
+  if (index === -1) { throw new Error('Parser rule not found: ' + name); }
+
+  this.__rules__[index].fn = fn;
+  this.__rules__[index].alt = opt.alt || [];
+  this.__cache__ = null;
+};
+
+
+/**
+ * Ruler.before(beforeName, ruleName, fn [, options])
+ * - beforeName (String): new rule will be added before this one.
+ * - ruleName (String): name of added rule.
+ * - fn (Function): rule function.
+ * - options (Object): rule options (not mandatory).
+ *
+ * Add new rule to chain before one with given name. See also
+ * [[Ruler.after]], [[Ruler.push]].
+ *
+ * ##### Options:
+ *
+ * - __alt__ - array with names of "alternate" chains.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var md = require('markdown-it')();
+ *
+ * md.block.ruler.before('paragraph', 'my_rule', function replace(state) {
+ *   //...
+ * });
+ * ```
+ **/
+Ruler.prototype.before = function (beforeName, ruleName, fn, options) {
+  var index = this.__find__(beforeName);
+  var opt = options || {};
+
+  if (index === -1) { throw new Error('Parser rule not found: ' + beforeName); }
+
+  this.__rules__.splice(index, 0, {
+    name: ruleName,
+    enabled: true,
+    fn: fn,
+    alt: opt.alt || []
+  });
+
+  this.__cache__ = null;
+};
+
+
+/**
+ * Ruler.after(afterName, ruleName, fn [, options])
+ * - afterName (String): new rule will be added after this one.
+ * - ruleName (String): name of added rule.
+ * - fn (Function): rule function.
+ * - options (Object): rule options (not mandatory).
+ *
+ * Add new rule to chain after one with given name. See also
+ * [[Ruler.before]], [[Ruler.push]].
+ *
+ * ##### Options:
+ *
+ * - __alt__ - array with names of "alternate" chains.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var md = require('markdown-it')();
+ *
+ * md.inline.ruler.after('text', 'my_rule', function replace(state) {
+ *   //...
+ * });
+ * ```
+ **/
+Ruler.prototype.after = function (afterName, ruleName, fn, options) {
+  var index = this.__find__(afterName);
+  var opt = options || {};
+
+  if (index === -1) { throw new Error('Parser rule not found: ' + afterName); }
+
+  this.__rules__.splice(index + 1, 0, {
+    name: ruleName,
+    enabled: true,
+    fn: fn,
+    alt: opt.alt || []
+  });
+
+  this.__cache__ = null;
+};
+
+/**
+ * Ruler.push(ruleName, fn [, options])
+ * - ruleName (String): name of added rule.
+ * - fn (Function): rule function.
+ * - options (Object): rule options (not mandatory).
+ *
+ * Push new rule to the end of chain. See also
+ * [[Ruler.before]], [[Ruler.after]].
+ *
+ * ##### Options:
+ *
+ * - __alt__ - array with names of "alternate" chains.
+ *
+ * ##### Example
+ *
+ * ```javascript
+ * var md = require('markdown-it')();
+ *
+ * md.core.ruler.push('my_rule', function replace(state) {
+ *   //...
+ * });
+ * ```
+ **/
+Ruler.prototype.push = function (ruleName, fn, options) {
+  var opt = options || {};
+
+  this.__rules__.push({
+    name: ruleName,
+    enabled: true,
+    fn: fn,
+    alt: opt.alt || []
+  });
+
+  this.__cache__ = null;
+};
+
+
+/**
+ * Ruler.enable(list [, ignoreInvalid]) -> Array
+ * - list (String|Array): list of rule names to enable.
+ * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
+ *
+ * Enable rules with given names. If any rule name not found - throw Error.
+ * Errors can be disabled by second param.
+ *
+ * Returns list of found rule names (if no exception happened).
+ *
+ * See also [[Ruler.disable]], [[Ruler.enableOnly]].
+ **/
+Ruler.prototype.enable = function (list, ignoreInvalid) {
+  if (!Array.isArray(list)) { list = [ list ]; }
+
+  var result = [];
+
+  // Search by name and enable
+  list.forEach(function (name) {
+    var idx = this.__find__(name);
+
+    if (idx < 0) {
+      if (ignoreInvalid) { return; }
+      throw new Error('Rules manager: invalid rule name ' + name);
+    }
+    this.__rules__[idx].enabled = true;
+    result.push(name);
+  }, this);
+
+  this.__cache__ = null;
+  return result;
+};
+
+
+/**
+ * Ruler.enableOnly(list [, ignoreInvalid])
+ * - list (String|Array): list of rule names to enable (whitelist).
+ * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
+ *
+ * Enable rules with given names, and disable everything else. If any rule name
+ * not found - throw Error. Errors can be disabled by second param.
+ *
+ * See also [[Ruler.disable]], [[Ruler.enable]].
+ **/
+Ruler.prototype.enableOnly = function (list, ignoreInvalid) {
+  if (!Array.isArray(list)) { list = [ list ]; }
+
+  this.__rules__.forEach(function (rule) { rule.enabled = false; });
+
+  this.enable(list, ignoreInvalid);
+};
+
+
+/**
+ * Ruler.disable(list [, ignoreInvalid]) -> Array
+ * - list (String|Array): list of rule names to disable.
+ * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
+ *
+ * Disable rules with given names. If any rule name not found - throw Error.
+ * Errors can be disabled by second param.
+ *
+ * Returns list of found rule names (if no exception happened).
+ *
+ * See also [[Ruler.enable]], [[Ruler.enableOnly]].
+ **/
+Ruler.prototype.disable = function (list, ignoreInvalid) {
+  if (!Array.isArray(list)) { list = [ list ]; }
+
+  var result = [];
+
+  // Search by name and disable
+  list.forEach(function (name) {
+    var idx = this.__find__(name);
+
+    if (idx < 0) {
+      if (ignoreInvalid) { return; }
+      throw new Error('Rules manager: invalid rule name ' + name);
+    }
+    this.__rules__[idx].enabled = false;
+    result.push(name);
+  }, this);
+
+  this.__cache__ = null;
+  return result;
+};
+
+
+/**
+ * Ruler.getRules(chainName) -> Array
+ *
+ * Return array of active functions (rules) for given chain name. It analyzes
+ * rules configuration, compiles caches if not exists and returns result.
+ *
+ * Default chain name is `''` (empty string). It can't be skipped. That's
+ * done intentionally, to keep signature monomorphic for high speed.
+ **/
+Ruler.prototype.getRules = function (chainName) {
+  if (this.__cache__ === null) {
+    this.__compile__();
+  }
+
+  // Chain can be empty, if rules disabled. But we still have to return Array.
+  return this.__cache__[chainName] || [];
+};
+
+module.exports = Ruler;
+
+},{}],46:[function(require,module,exports){
+// Block quotes
+
+'use strict';
+
+var isSpace = require('../common/utils').isSpace;
+
+
+module.exports = function blockquote(state, startLine, endLine, silent) {
+  var nextLine, lastLineEmpty, oldTShift, oldSCount, oldBMarks, oldIndent, oldParentType, lines, initial, offset, ch,
+      terminatorRules, token,
+      i, l, terminate,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
+
+  // check the block quote marker
+  if (state.src.charCodeAt(pos++) !== 0x3E/* > */) { return false; }
+
+  // we know that it's going to be a valid blockquote,
+  // so no point trying to find the end of it in silent mode
+  if (silent) { return true; }
+
+  // skip one optional space (but not tab, check cmark impl) after '>'
+  if (state.src.charCodeAt(pos) === 0x20) { pos++; }
+
+  oldIndent = state.blkIndent;
+  state.blkIndent = 0;
+
+  // skip spaces after ">" and re-calculate offset
+  initial = offset = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine]);
+
+  oldBMarks = [ state.bMarks[startLine] ];
+  state.bMarks[startLine] = pos;
+
+  while (pos < max) {
+    ch = state.src.charCodeAt(pos);
+
+    if (isSpace(ch)) {
+      if (ch === 0x09) {
+        offset += 4 - offset % 4;
+      } else {
+        offset++;
+      }
+    } else {
+      break;
+    }
+
+    pos++;
+  }
+
+  lastLineEmpty = pos >= max;
+
+  oldSCount = [ state.sCount[startLine] ];
+  state.sCount[startLine] = offset - initial;
+
+  oldTShift = [ state.tShift[startLine] ];
+  state.tShift[startLine] = pos - state.bMarks[startLine];
+
+  terminatorRules = state.md.block.ruler.getRules('blockquote');
+
+  // Search the end of the block
+  //
+  // Block ends with either:
+  //  1. an empty line outside:
+  //     ```
+  //     > test
+  //
+  //     ```
+  //  2. an empty line inside:
+  //     ```
+  //     >
+  //     test
+  //     ```
+  //  3. another tag
+  //     ```
+  //     > test
+  //      - - -
+  //     ```
+  for (nextLine = startLine + 1; nextLine < endLine; nextLine++) {
+    if (state.sCount[nextLine] < oldIndent) { break; }
+
+    pos = state.bMarks[nextLine] + state.tShift[nextLine];
+    max = state.eMarks[nextLine];
+
+    if (pos >= max) {
+      // Case 1: line is not inside the blockquote, and this line is empty.
+      break;
+    }
+
+    if (state.src.charCodeAt(pos++) === 0x3E/* > */) {
+      // This line is inside the blockquote.
+
+      // skip one optional space (but not tab, check cmark impl) after '>'
+      if (state.src.charCodeAt(pos) === 0x20) { pos++; }
+
+      // skip spaces after ">" and re-calculate offset
+      initial = offset = state.sCount[nextLine] + pos - (state.bMarks[nextLine] + state.tShift[nextLine]);
+
+      oldBMarks.push(state.bMarks[nextLine]);
+      state.bMarks[nextLine] = pos;
+
+      while (pos < max) {
+        ch = state.src.charCodeAt(pos);
+
+        if (isSpace(ch)) {
+          if (ch === 0x09) {
+            offset += 4 - offset % 4;
+          } else {
+            offset++;
+          }
+        } else {
+          break;
+        }
+
+        pos++;
+      }
+
+      lastLineEmpty = pos >= max;
+
+      oldSCount.push(state.sCount[nextLine]);
+      state.sCount[nextLine] = offset - initial;
+
+      oldTShift.push(state.tShift[nextLine]);
+      state.tShift[nextLine] = pos - state.bMarks[nextLine];
+      continue;
+    }
+
+    // Case 2: line is not inside the blockquote, and the last line was empty.
+    if (lastLineEmpty) { break; }
+
+    // Case 3: another tag found.
+    terminate = false;
+    for (i = 0, l = terminatorRules.length; i < l; i++) {
+      if (terminatorRules[i](state, nextLine, endLine, true)) {
+        terminate = true;
+        break;
+      }
+    }
+    if (terminate) { break; }
+
+    oldBMarks.push(state.bMarks[nextLine]);
+    oldTShift.push(state.tShift[nextLine]);
+    oldSCount.push(state.sCount[nextLine]);
+
+    // A negative indentation means that this is a paragraph continuation
+    //
+    state.sCount[nextLine] = -1;
+  }
+
+  oldParentType = state.parentType;
+  state.parentType = 'blockquote';
+
+  token        = state.push('blockquote_open', 'blockquote', 1);
+  token.markup = '>';
+  token.map    = lines = [ startLine, 0 ];
+
+  state.md.block.tokenize(state, startLine, nextLine);
+
+  token        = state.push('blockquote_close', 'blockquote', -1);
+  token.markup = '>';
+
+  state.parentType = oldParentType;
+  lines[1] = state.line;
+
+  // Restore original tShift; this might not be necessary since the parser
+  // has already been here, but just to make sure we can do that.
+  for (i = 0; i < oldTShift.length; i++) {
+    state.bMarks[i + startLine] = oldBMarks[i];
+    state.tShift[i + startLine] = oldTShift[i];
+    state.sCount[i + startLine] = oldSCount[i];
+  }
+  state.blkIndent = oldIndent;
+
+  return true;
+};
+
+},{"../common/utils":32}],47:[function(require,module,exports){
+// Code block (4 spaces padded)
+
+'use strict';
+
+
+module.exports = function code(state, startLine, endLine/*, silent*/) {
+  var nextLine, last, token, emptyLines = 0;
+
+  if (state.sCount[startLine] - state.blkIndent < 4) { return false; }
+
+  last = nextLine = startLine + 1;
+
+  while (nextLine < endLine) {
+    if (state.isEmpty(nextLine)) {
+      emptyLines++;
+
+      // workaround for lists: 2 blank lines should terminate indented
+      // code block, but not fenced code block
+      if (emptyLines >= 2 && state.parentType === 'list') {
+        break;
+      }
+
+      nextLine++;
+      continue;
+    }
+
+    emptyLines = 0;
+
+    if (state.sCount[nextLine] - state.blkIndent >= 4) {
+      nextLine++;
+      last = nextLine;
+      continue;
+    }
+    break;
+  }
+
+  state.line = last;
+
+  token         = state.push('code_block', 'code', 0);
+  token.content = state.getLines(startLine, last, 4 + state.blkIndent, true);
+  token.map     = [ startLine, state.line ];
+
+  return true;
+};
+
+},{}],48:[function(require,module,exports){
+// fences (``` lang, ~~~ lang)
+
+'use strict';
+
+
+module.exports = function fence(state, startLine, endLine, silent) {
+  var marker, len, params, nextLine, mem, token, markup,
+      haveEndMarker = false,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
+
+  if (pos + 3 > max) { return false; }
+
+  marker = state.src.charCodeAt(pos);
+
+  if (marker !== 0x7E/* ~ */ && marker !== 0x60 /* ` */) {
+    return false;
+  }
+
+  // scan marker length
+  mem = pos;
+  pos = state.skipChars(pos, marker);
+
+  len = pos - mem;
+
+  if (len < 3) { return false; }
+
+  markup = state.src.slice(mem, pos);
+  params = state.src.slice(pos, max);
+
+  if (params.indexOf('`') >= 0) { return false; }
+
+  // Since start is found, we can report success here in validation mode
+  if (silent) { return true; }
+
+  // search end of block
+  nextLine = startLine;
+
+  for (;;) {
+    nextLine++;
+    if (nextLine >= endLine) {
+      // unclosed block should be autoclosed by end of document.
+      // also block seems to be autoclosed by end of parent
+      break;
+    }
+
+    pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
+    max = state.eMarks[nextLine];
+
+    if (pos < max && state.sCount[nextLine] < state.blkIndent) {
+      // non-empty line with negative indent should stop the list:
+      // - ```
+      //  test
+      break;
+    }
+
+    if (state.src.charCodeAt(pos) !== marker) { continue; }
+
+    if (state.sCount[nextLine] - state.blkIndent >= 4) {
+      // closing fence should be indented less than 4 spaces
+      continue;
+    }
+
+    pos = state.skipChars(pos, marker);
+
+    // closing code fence must be at least as long as the opening one
+    if (pos - mem < len) { continue; }
+
+    // make sure tail has spaces only
+    pos = state.skipSpaces(pos);
+
+    if (pos < max) { continue; }
+
+    haveEndMarker = true;
+    // found!
+    break;
+  }
+
+  // If a fence has heading spaces, they should be removed from its inner block
+  len = state.sCount[startLine];
+
+  state.line = nextLine + (haveEndMarker ? 1 : 0);
+
+  token         = state.push('fence', 'code', 0);
+  token.info    = params;
+  token.content = state.getLines(startLine + 1, nextLine, len, true);
+  token.markup  = markup;
+  token.map     = [ startLine, state.line ];
+
+  return true;
+};
+
+},{}],49:[function(require,module,exports){
+// heading (#, ##, ...)
+
+'use strict';
+
+var isSpace = require('../common/utils').isSpace;
+
+
+module.exports = function heading(state, startLine, endLine, silent) {
+  var ch, level, tmp, token,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
+
+  ch  = state.src.charCodeAt(pos);
+
+  if (ch !== 0x23/* # */ || pos >= max) { return false; }
+
+  // count heading level
+  level = 1;
+  ch = state.src.charCodeAt(++pos);
+  while (ch === 0x23/* # */ && pos < max && level <= 6) {
+    level++;
+    ch = state.src.charCodeAt(++pos);
+  }
+
+  if (level > 6 || (pos < max && ch !== 0x20/* space */)) { return false; }
+
+  if (silent) { return true; }
+
+  // Let's cut tails like '    ###  ' from the end of string
+
+  max = state.skipSpacesBack(max, pos);
+  tmp = state.skipCharsBack(max, 0x23, pos); // #
+  if (tmp > pos && isSpace(state.src.charCodeAt(tmp - 1))) {
+    max = tmp;
+  }
+
+  state.line = startLine + 1;
+
+  token        = state.push('heading_open', 'h' + String(level), 1);
+  token.markup = '########'.slice(0, level);
+  token.map    = [ startLine, state.line ];
+
+  token          = state.push('inline', '', 0);
+  token.content  = state.src.slice(pos, max).trim();
+  token.map      = [ startLine, state.line ];
+  token.children = [];
+
+  token        = state.push('heading_close', 'h' + String(level), -1);
+  token.markup = '########'.slice(0, level);
+
+  return true;
+};
+
+},{"../common/utils":32}],50:[function(require,module,exports){
+// Horizontal rule
+
+'use strict';
+
+var isSpace = require('../common/utils').isSpace;
+
+
+module.exports = function hr(state, startLine, endLine, silent) {
+  var marker, cnt, ch, token,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
+
+  marker = state.src.charCodeAt(pos++);
+
+  // Check hr marker
+  if (marker !== 0x2A/* * */ &&
+      marker !== 0x2D/* - */ &&
+      marker !== 0x5F/* _ */) {
+    return false;
+  }
+
+  // markers can be mixed with spaces, but there should be at least 3 of them
+
+  cnt = 1;
+  while (pos < max) {
+    ch = state.src.charCodeAt(pos++);
+    if (ch !== marker && !isSpace(ch)) { return false; }
+    if (ch === marker) { cnt++; }
+  }
+
+  if (cnt < 3) { return false; }
+
+  if (silent) { return true; }
+
+  state.line = startLine + 1;
+
+  token        = state.push('hr', 'hr', 0);
+  token.map    = [ startLine, state.line ];
+  token.markup = Array(cnt + 1).join(String.fromCharCode(marker));
+
+  return true;
+};
+
+},{"../common/utils":32}],51:[function(require,module,exports){
+// HTML block
+
+'use strict';
+
+
+var block_names = require('../common/html_blocks');
+var HTML_OPEN_CLOSE_TAG_RE = require('../common/html_re').HTML_OPEN_CLOSE_TAG_RE;
+
+// An array of opening and corresponding closing sequences for html tags,
+// last argument defines whether it can terminate a paragraph or not
+//
+var HTML_SEQUENCES = [
+  [ /^<(script|pre|style)(?=(\s|>|$))/i, /<\/(script|pre|style)>/i, true ],
+  [ /^<!--/,        /-->/,   true ],
+  [ /^<\?/,         /\?>/,   true ],
+  [ /^<![A-Z]/,     />/,     true ],
+  [ /^<!\[CDATA\[/, /\]\]>/, true ],
+  [ new RegExp('^</?(' + block_names.join('|') + ')(?=(\\s|/?>|$))', 'i'), /^$/, true ],
+  [ new RegExp(HTML_OPEN_CLOSE_TAG_RE.source + '\\s*$'),  /^$/, false ]
+];
+
+
+module.exports = function html_block(state, startLine, endLine, silent) {
+  var i, nextLine, token, lineText,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine];
+
+  if (!state.md.options.html) { return false; }
+
+  if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
+
+  lineText = state.src.slice(pos, max);
+
+  for (i = 0; i < HTML_SEQUENCES.length; i++) {
+    if (HTML_SEQUENCES[i][0].test(lineText)) { break; }
+  }
+
+  if (i === HTML_SEQUENCES.length) { return false; }
+
+  if (silent) {
+    // true if this sequence can be a terminator, false otherwise
+    return HTML_SEQUENCES[i][2];
+  }
+
+  nextLine = startLine + 1;
+
+  // If we are here - we detected HTML block.
+  // Let's roll down till block end.
+  if (!HTML_SEQUENCES[i][1].test(lineText)) {
+    for (; nextLine < endLine; nextLine++) {
+      if (state.sCount[nextLine] < state.blkIndent) { break; }
+
+      pos = state.bMarks[nextLine] + state.tShift[nextLine];
+      max = state.eMarks[nextLine];
+      lineText = state.src.slice(pos, max);
+
+      if (HTML_SEQUENCES[i][1].test(lineText)) {
+        if (lineText.length !== 0) { nextLine++; }
+        break;
+      }
+    }
+  }
+
+  state.line = nextLine;
+
+  token         = state.push('html_block', '', 0);
+  token.map     = [ startLine, nextLine ];
+  token.content = state.getLines(startLine, nextLine, state.blkIndent, true);
+
+  return true;
+};
+
+},{"../common/html_blocks":30,"../common/html_re":31}],52:[function(require,module,exports){
+// lheading (---, ===)
+
+'use strict';
+
+
+module.exports = function lheading(state, startLine, endLine/*, silent*/) {
+  var content, terminate, i, l, token, pos, max, level, marker,
+      nextLine = startLine + 1,
+      terminatorRules = state.md.block.ruler.getRules('paragraph');
+
+  // jump line-by-line until empty one or EOF
+  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
+    // this would be a code block normally, but after paragraph
+    // it's considered a lazy continuation regardless of what's there
+    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }
+
+    //
+    // Check for underline in setext header
+    //
+    if (state.sCount[nextLine] >= state.blkIndent) {
+      pos = state.bMarks[nextLine] + state.tShift[nextLine];
+      max = state.eMarks[nextLine];
+
+      if (pos < max) {
+        marker = state.src.charCodeAt(pos);
+
+        if (marker === 0x2D/* - */ || marker === 0x3D/* = */) {
+          pos = state.skipChars(pos, marker);
+          pos = state.skipSpaces(pos);
+
+          if (pos >= max) {
+            level = (marker === 0x3D/* = */ ? 1 : 2);
+            break;
+          }
+        }
+      }
+    }
+
+    // quirk for blockquotes, this line should already be checked by that rule
+    if (state.sCount[nextLine] < 0) { continue; }
+
+    // Some tags can terminate paragraph without empty line.
+    terminate = false;
+    for (i = 0, l = terminatorRules.length; i < l; i++) {
+      if (terminatorRules[i](state, nextLine, endLine, true)) {
+        terminate = true;
+        break;
+      }
+    }
+    if (terminate) { break; }
+  }
+
+  if (!level) {
+    // Didn't find valid underline
+    return false;
+  }
+
+  content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
+
+  state.line = nextLine + 1;
+
+  token          = state.push('heading_open', 'h' + String(level), 1);
+  token.markup   = String.fromCharCode(marker);
+  token.map      = [ startLine, state.line ];
+
+  token          = state.push('inline', '', 0);
+  token.content  = content;
+  token.map      = [ startLine, state.line - 1 ];
+  token.children = [];
+
+  token          = state.push('heading_close', 'h' + String(level), -1);
+  token.markup   = String.fromCharCode(marker);
+
+  return true;
+};
+
+},{}],53:[function(require,module,exports){
+// Lists
+
+'use strict';
+
+var isSpace = require('../common/utils').isSpace;
+
+
+// Search `[-+*][\n ]`, returns next pos arter marker on success
+// or -1 on fail.
+function skipBulletListMarker(state, startLine) {
+  var marker, pos, max, ch;
+
+  pos = state.bMarks[startLine] + state.tShift[startLine];
+  max = state.eMarks[startLine];
+
+  marker = state.src.charCodeAt(pos++);
+  // Check bullet
+  if (marker !== 0x2A/* * */ &&
+      marker !== 0x2D/* - */ &&
+      marker !== 0x2B/* + */) {
+    return -1;
+  }
+
+  if (pos < max) {
+    ch = state.src.charCodeAt(pos);
+
+    if (!isSpace(ch)) {
+      // " -test " - is not a list item
+      return -1;
+    }
+  }
+
+  return pos;
+}
+
+// Search `\d+[.)][\n ]`, returns next pos arter marker on success
+// or -1 on fail.
+function skipOrderedListMarker(state, startLine) {
+  var ch,
+      start = state.bMarks[startLine] + state.tShift[startLine],
+      pos = start,
+      max = state.eMarks[startLine];
+
+  // List marker should have at least 2 chars (digit + dot)
+  if (pos + 1 >= max) { return -1; }
+
+  ch = state.src.charCodeAt(pos++);
+
+  if (ch < 0x30/* 0 */ || ch > 0x39/* 9 */) { return -1; }
+
+  for (;;) {
+    // EOL -> fail
+    if (pos >= max) { return -1; }
+
+    ch = state.src.charCodeAt(pos++);
+
+    if (ch >= 0x30/* 0 */ && ch <= 0x39/* 9 */) {
+
+      // List marker should have no more than 9 digits
+      // (prevents integer overflow in browsers)
+      if (pos - start >= 10) { return -1; }
+
+      continue;
+    }
+
+    // found valid marker
+    if (ch === 0x29/* ) */ || ch === 0x2e/* . */) {
+      break;
+    }
+
+    return -1;
+  }
+
+
+  if (pos < max) {
+    ch = state.src.charCodeAt(pos);
+
+    if (!isSpace(ch)) {
+      // " 1.test " - is not a list item
+      return -1;
+    }
+  }
+  return pos;
+}
+
+function markTightParagraphs(state, idx) {
+  var i, l,
+      level = state.level + 2;
+
+  for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
+    if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
+      state.tokens[i + 2].hidden = true;
+      state.tokens[i].hidden = true;
+      i += 2;
+    }
+  }
+}
+
+
+module.exports = function list(state, startLine, endLine, silent) {
+  var nextLine,
+      initial,
+      offset,
+      indent,
+      oldTShift,
+      oldIndent,
+      oldLIndent,
+      oldTight,
+      oldParentType,
+      start,
+      posAfterMarker,
+      ch,
+      pos,
+      max,
+      indentAfterMarker,
+      markerValue,
+      markerCharCode,
+      isOrdered,
+      contentStart,
+      listTokIdx,
+      prevEmptyEnd,
+      listLines,
+      itemLines,
+      tight = true,
+      terminatorRules,
+      token,
+      i, l, terminate;
+
+  // Detect list type and position after marker
+  if ((posAfterMarker = skipOrderedListMarker(state, startLine)) >= 0) {
+    isOrdered = true;
+  } else if ((posAfterMarker = skipBulletListMarker(state, startLine)) >= 0) {
+    isOrdered = false;
+  } else {
+    return false;
+  }
+
+  // We should terminate list on style change. Remember first one to compare.
+  markerCharCode = state.src.charCodeAt(posAfterMarker - 1);
+
+  // For validation mode we can terminate immediately
+  if (silent) { return true; }
+
+  // Start list
+  listTokIdx = state.tokens.length;
+
+  if (isOrdered) {
+    start = state.bMarks[startLine] + state.tShift[startLine];
+    markerValue = Number(state.src.substr(start, posAfterMarker - start - 1));
+
+    token       = state.push('ordered_list_open', 'ol', 1);
+    if (markerValue !== 1) {
+      token.attrs = [ [ 'start', markerValue ] ];
+    }
+
+  } else {
+    token       = state.push('bullet_list_open', 'ul', 1);
+  }
+
+  token.map    = listLines = [ startLine, 0 ];
+  token.markup = String.fromCharCode(markerCharCode);
+
+  //
+  // Iterate list items
+  //
+
+  nextLine = startLine;
+  prevEmptyEnd = false;
+  terminatorRules = state.md.block.ruler.getRules('list');
+
+  while (nextLine < endLine) {
+    pos = posAfterMarker;
+    max = state.eMarks[nextLine];
+
+    initial = offset = state.sCount[nextLine] + posAfterMarker - (state.bMarks[startLine] + state.tShift[startLine]);
+
+    while (pos < max) {
+      ch = state.src.charCodeAt(pos);
+
+      if (isSpace(ch)) {
+        if (ch === 0x09) {
+          offset += 4 - offset % 4;
+        } else {
+          offset++;
+        }
+      } else {
+        break;
+      }
+
+      pos++;
+    }
+
+    contentStart = pos;
+
+    if (contentStart >= max) {
+      // trimming space in "-    \n  3" case, indent is 1 here
+      indentAfterMarker = 1;
+    } else {
+      indentAfterMarker = offset - initial;
+    }
+
+    // If we have more than 4 spaces, the indent is 1
+    // (the rest is just indented code block)
+    if (indentAfterMarker > 4) { indentAfterMarker = 1; }
+
+    // "  -  test"
+    //  ^^^^^ - calculating total length of this thing
+    indent = initial + indentAfterMarker;
+
+    // Run subparser & write tokens
+    token        = state.push('list_item_open', 'li', 1);
+    token.markup = String.fromCharCode(markerCharCode);
+    token.map    = itemLines = [ startLine, 0 ];
+
+    oldIndent = state.blkIndent;
+    oldTight = state.tight;
+    oldTShift = state.tShift[startLine];
+    oldLIndent = state.sCount[startLine];
+    oldParentType = state.parentType;
+    state.blkIndent = indent;
+    state.tight = true;
+    state.parentType = 'list';
+    state.tShift[startLine] = contentStart - state.bMarks[startLine];
+    state.sCount[startLine] = offset;
+
+    if (contentStart >= max && state.isEmpty(startLine + 1)) {
+      // workaround for this case
+      // (list item is empty, list terminates before "foo"):
+      // ~~~~~~~~
+      //   -
+      //
+      //     foo
+      // ~~~~~~~~
+      state.line = Math.min(state.line + 2, endLine);
+    } else {
+      state.md.block.tokenize(state, startLine, endLine, true);
+    }
+
+    // If any of list item is tight, mark list as tight
+    if (!state.tight || prevEmptyEnd) {
+      tight = false;
+    }
+    // Item become loose if finish with empty line,
+    // but we should filter last element, because it means list finish
+    prevEmptyEnd = (state.line - startLine) > 1 && state.isEmpty(state.line - 1);
+
+    state.blkIndent = oldIndent;
+    state.tShift[startLine] = oldTShift;
+    state.sCount[startLine] = oldLIndent;
+    state.tight = oldTight;
+    state.parentType = oldParentType;
+
+    token        = state.push('list_item_close', 'li', -1);
+    token.markup = String.fromCharCode(markerCharCode);
+
+    nextLine = startLine = state.line;
+    itemLines[1] = nextLine;
+    contentStart = state.bMarks[startLine];
+
+    if (nextLine >= endLine) { break; }
+
+    if (state.isEmpty(nextLine)) {
+      break;
+    }
+
+    //
+    // Try to check if list is terminated or continued.
+    //
+    if (state.sCount[nextLine] < state.blkIndent) { break; }
+
+    // fail if terminating block found
+    terminate = false;
+    for (i = 0, l = terminatorRules.length; i < l; i++) {
+      if (terminatorRules[i](state, nextLine, endLine, true)) {
+        terminate = true;
+        break;
+      }
+    }
+    if (terminate) { break; }
+
+    // fail if list has another type
+    if (isOrdered) {
+      posAfterMarker = skipOrderedListMarker(state, nextLine);
+      if (posAfterMarker < 0) { break; }
+    } else {
+      posAfterMarker = skipBulletListMarker(state, nextLine);
+      if (posAfterMarker < 0) { break; }
+    }
+
+    if (markerCharCode !== state.src.charCodeAt(posAfterMarker - 1)) { break; }
+  }
+
+  // Finilize list
+  if (isOrdered) {
+    token = state.push('ordered_list_close', 'ol', -1);
+  } else {
+    token = state.push('bullet_list_close', 'ul', -1);
+  }
+  token.markup = String.fromCharCode(markerCharCode);
+
+  listLines[1] = nextLine;
+  state.line = nextLine;
+
+  // mark paragraphs tight if needed
+  if (tight) {
+    markTightParagraphs(state, listTokIdx);
+  }
+
+  return true;
+};
+
+},{"../common/utils":32}],54:[function(require,module,exports){
+// Paragraph
+
+'use strict';
+
+
+module.exports = function paragraph(state, startLine/*, endLine*/) {
+  var content, terminate, i, l, token,
+      nextLine = startLine + 1,
+      terminatorRules = state.md.block.ruler.getRules('paragraph'),
+      endLine = state.lineMax;
+
+  // jump line-by-line until empty one or EOF
+  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
+    // this would be a code block normally, but after paragraph
+    // it's considered a lazy continuation regardless of what's there
+    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }
+
+    // quirk for blockquotes, this line should already be checked by that rule
+    if (state.sCount[nextLine] < 0) { continue; }
+
+    // Some tags can terminate paragraph without empty line.
+    terminate = false;
+    for (i = 0, l = terminatorRules.length; i < l; i++) {
+      if (terminatorRules[i](state, nextLine, endLine, true)) {
+        terminate = true;
+        break;
+      }
+    }
+    if (terminate) { break; }
+  }
+
+  content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
+
+  state.line = nextLine;
+
+  token          = state.push('paragraph_open', 'p', 1);
+  token.map      = [ startLine, state.line ];
+
+  token          = state.push('inline', '', 0);
+  token.content  = content;
+  token.map      = [ startLine, state.line ];
+  token.children = [];
+
+  token          = state.push('paragraph_close', 'p', -1);
+
+  return true;
+};
+
+},{}],55:[function(require,module,exports){
+'use strict';
+
+
+var parseLinkDestination = require('../helpers/parse_link_destination');
+var parseLinkTitle       = require('../helpers/parse_link_title');
+var normalizeReference   = require('../common/utils').normalizeReference;
+var isSpace              = require('../common/utils').isSpace;
+
+
+module.exports = function reference(state, startLine, _endLine, silent) {
+  var ch,
+      destEndPos,
+      destEndLineNo,
+      endLine,
+      href,
+      i,
+      l,
+      label,
+      labelEnd,
+      res,
+      start,
+      str,
+      terminate,
+      terminatorRules,
+      title,
+      lines = 0,
+      pos = state.bMarks[startLine] + state.tShift[startLine],
+      max = state.eMarks[startLine],
+      nextLine = startLine + 1;
+
+  if (state.src.charCodeAt(pos) !== 0x5B/* [ */) { return false; }
+
+  // Simple check to quickly interrupt scan on [link](url) at the start of line.
+  // Can be useful on practice: https://github.com/markdown-it/markdown-it/issues/54
+  while (++pos < max) {
+    if (state.src.charCodeAt(pos) === 0x5D /* ] */ &&
+        state.src.charCodeAt(pos - 1) !== 0x5C/* \ */) {
+      if (pos + 1 === max) { return false; }
+      if (state.src.charCodeAt(pos + 1) !== 0x3A/* : */) { return false; }
+      break;
+    }
+  }
+
+  endLine = state.lineMax;
+
+  // jump line-by-line until empty one or EOF
+  terminatorRules = state.md.block.ruler.getRules('reference');
+
+  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
+    // this would be a code block normally, but after paragraph
+    // it's considered a lazy continuation regardless of what's there
+    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }
+
+    // quirk for blockquotes, this line should already be checked by that rule
+    if (state.sCount[nextLine] < 0) { continue; }
+
+    // Some tags can terminate paragraph without empty line.
+    terminate = false;
+    for (i = 0, l = terminatorRules.length; i < l; i++) {
+      if (terminatorRules[i](state, nextLine, endLine, true)) {
+        terminate = true;
+        break;
+      }
+    }
+    if (terminate) { break; }
+  }
+
+  str = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
+  max = str.length;
+
+  for (pos = 1; pos < max; pos++) {
+    ch = str.charCodeAt(pos);
+    if (ch === 0x5B /* [ */) {
+      return false;
+    } else if (ch === 0x5D /* ] */) {
+      labelEnd = pos;
+      break;
+    } else if (ch === 0x0A /* \n */) {
+      lines++;
+    } else if (ch === 0x5C /* \ */) {
+      pos++;
+      if (pos < max && str.charCodeAt(pos) === 0x0A) {
+        lines++;
+      }
+    }
+  }
+
+  if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return false; }
+
+  // [label]:   destination   'title'
+  //         ^^^ skip optional whitespace here
+  for (pos = labelEnd + 2; pos < max; pos++) {
+    ch = str.charCodeAt(pos);
+    if (ch === 0x0A) {
+      lines++;
+    } else if (isSpace(ch)) {
+      /*eslint no-empty:0*/
+    } else {
+      break;
+    }
+  }
+
+  // [label]:   destination   'title'
+  //            ^^^^^^^^^^^ parse this
+  res = parseLinkDestination(str, pos, max);
+  if (!res.ok) { return false; }
+
+  href = state.md.normalizeLink(res.str);
+  if (!state.md.validateLink(href)) { return false; }
+
+  pos = res.pos;
+  lines += res.lines;
+
+  // save cursor state, we could require to rollback later
+  destEndPos = pos;
+  destEndLineNo = lines;
+
+  // [label]:   destination   'title'
+  //                       ^^^ skipping those spaces
+  start = pos;
+  for (; pos < max; pos++) {
+    ch = str.charCodeAt(pos);
+    if (ch === 0x0A) {
+      lines++;
+    } else if (isSpace(ch)) {
+      /*eslint no-empty:0*/
+    } else {
+      break;
+    }
+  }
+
+  // [label]:   destination   'title'
+  //                          ^^^^^^^ parse this
+  res = parseLinkTitle(str, pos, max);
+  if (pos < max && start !== pos && res.ok) {
+    title = res.str;
+    pos = res.pos;
+    lines += res.lines;
+  } else {
+    title = '';
+    pos = destEndPos;
+    lines = destEndLineNo;
+  }
+
+  // skip trailing spaces until the rest of the line
+  while (pos < max) {
+    ch = str.charCodeAt(pos);
+    if (!isSpace(ch)) { break; }
+    pos++;
+  }
+
+  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
+    if (title) {
+      // garbage at the end of the line after title,
+      // but it could still be a valid reference if we roll back
+      title = '';
+      pos = destEndPos;
+      lines = destEndLineNo;
+      while (pos < max) {
+        ch = str.charCodeAt(pos);
+        if (!isSpace(ch)) { break; }
+        pos++;
+      }
+    }
+  }
+
+  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
+    // garbage at the end of the line
+    return false;
+  }
+
+  label = normalizeReference(str.slice(1, labelEnd));
+  if (!label) {
+    // CommonMark 0.20 disallows empty labels
+    return false;
+  }
+
+  // Reference can not terminate anything. This check is for safety only.
+  /*istanbul ignore if*/
+  if (silent) { return true; }
+
+  if (typeof state.env.references === 'undefined') {
+    state.env.references = {};
+  }
+  if (typeof state.env.references[label] === 'undefined') {
+    state.env.references[label] = { title: title, href: href };
+  }
+
+  state.line = startLine + lines + 1;
+  return true;
+};
+
+},{"../common/utils":32,"../helpers/parse_link_destination":34,"../helpers/parse_link_title":36}],56:[function(require,module,exports){
+// Parser state class
+
+'use strict';
+
+var Token = require('../token');
+var isSpace = require('../common/utils').isSpace;
+
+
+function StateBlock(src, md, env, tokens) {
+  var ch, s, start, pos, len, indent, offset, indent_found;
+
+  this.src = src;
+
+  // link to parser instance
+  this.md     = md;
+
+  this.env = env;
+
+  //
+  // Internal state vartiables
+  //
+
+  this.tokens = tokens;
+
+  this.bMarks = [];  // line begin offsets for fast jumps
+  this.eMarks = [];  // line end offsets for fast jumps
+  this.tShift = [];  // offsets of the first non-space characters (tabs not expanded)
+  this.sCount = [];  // indents for each line (tabs expanded)
+
+  // block parser variables
+  this.blkIndent  = 0; // required block content indent
+                       // (for example, if we are in list)
+  this.line       = 0; // line index in src
+  this.lineMax    = 0; // lines count
+  this.tight      = false;  // loose/tight mode for lists
+  this.parentType = 'root'; // if `list`, block parser stops on two newlines
+  this.ddIndent   = -1; // indent of the current dd block (-1 if there isn't any)
+
+  this.level = 0;
+
+  // renderer
+  this.result = '';
+
+  // Create caches
+  // Generate markers.
+  s = this.src;
+  indent_found = false;
+
+  for (start = pos = indent = offset = 0, len = s.length; pos < len; pos++) {
+    ch = s.charCodeAt(pos);
+
+    if (!indent_found) {
+      if (isSpace(ch)) {
+        indent++;
+
+        if (ch === 0x09) {
+          offset += 4 - offset % 4;
+        } else {
+          offset++;
+        }
+        continue;
+      } else {
+        indent_found = true;
+      }
+    }
+
+    if (ch === 0x0A || pos === len - 1) {
+      if (ch !== 0x0A) { pos++; }
+      this.bMarks.push(start);
+      this.eMarks.push(pos);
+      this.tShift.push(indent);
+      this.sCount.push(offset);
+
+      indent_found = false;
+      indent = 0;
+      offset = 0;
+      start = pos + 1;
+    }
+  }
+
+  // Push fake entry to simplify cache bounds checks
+  this.bMarks.push(s.length);
+  this.eMarks.push(s.length);
+  this.tShift.push(0);
+  this.sCount.push(0);
+
+  this.lineMax = this.bMarks.length - 1; // don't count last fake line
+}
+
+// Push new token to "stream".
+//
+StateBlock.prototype.push = function (type, tag, nesting) {
+  var token = new Token(type, tag, nesting);
+  token.block = true;
+
+  if (nesting < 0) { this.level--; }
+  token.level = this.level;
+  if (nesting > 0) { this.level++; }
+
+  this.tokens.push(token);
+  return token;
+};
+
+StateBlock.prototype.isEmpty = function isEmpty(line) {
+  return this.bMarks[line] + this.tShift[line] >= this.eMarks[line];
+};
+
+StateBlock.prototype.skipEmptyLines = function skipEmptyLines(from) {
+  for (var max = this.lineMax; from < max; from++) {
+    if (this.bMarks[from] + this.tShift[from] < this.eMarks[from]) {
+      break;
+    }
+  }
+  return from;
+};
+
+// Skip spaces from given position.
+StateBlock.prototype.skipSpaces = function skipSpaces(pos) {
+  var ch;
+
+  for (var max = this.src.length; pos < max; pos++) {
+    ch = this.src.charCodeAt(pos);
+    if (!isSpace(ch)) { break; }
+  }
+  return pos;
+};
+
+// Skip spaces from given position in reverse.
+StateBlock.prototype.skipSpacesBack = function skipSpacesBack(pos, min) {
+  if (pos <= min) { return pos; }
+
+  while (pos > min) {
+    if (!isSpace(this.src.charCodeAt(--pos))) { return pos + 1; }
+  }
+  return pos;
+};
+
+// Skip char codes from given position
+StateBlock.prototype.skipChars = function skipChars(pos, code) {
+  for (var max = this.src.length; pos < max; pos++) {
+    if (this.src.charCodeAt(pos) !== code) { break; }
+  }
+  return pos;
+};
+
+// Skip char codes reverse from given position - 1
+StateBlock.prototype.skipCharsBack = function skipCharsBack(pos, code, min) {
+  if (pos <= min) { return pos; }
+
+  while (pos > min) {
+    if (code !== this.src.charCodeAt(--pos)) { return pos + 1; }
+  }
+  return pos;
+};
+
+// cut lines range from source.
+StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF) {
+  var i, lineIndent, ch, first, last, queue, lineStart,
+      line = begin;
+
+  if (begin >= end) {
+    return '';
+  }
+
+  queue = new Array(end - begin);
+
+  for (i = 0; line < end; line++, i++) {
+    lineIndent = 0;
+    lineStart = first = this.bMarks[line];
+
+    if (line + 1 < end || keepLastLF) {
+      // No need for bounds check because we have fake entry on tail.
+      last = this.eMarks[line] + 1;
+    } else {
+      last = this.eMarks[line];
+    }
+
+    while (first < last && lineIndent < indent) {
+      ch = this.src.charCodeAt(first);
+
+      if (isSpace(ch)) {
+        if (ch === 0x09) {
+          lineIndent += 4 - lineIndent % 4;
+        } else {
+          lineIndent++;
+        }
+      } else if (first - lineStart < this.tShift[line]) {
+        // patched tShift masked characters to look like spaces (blockquotes, list markers)
+        lineIndent++;
+      } else {
+        break;
+      }
+
+      first++;
+    }
+
+    queue[i] = this.src.slice(first, last);
+  }
+
+  return queue.join('');
+};
+
+// re-export Token class to use in block rules
+StateBlock.prototype.Token = Token;
+
+
+module.exports = StateBlock;
+
+},{"../common/utils":32,"../token":79}],57:[function(require,module,exports){
+// GFM table, non-standard
+
+'use strict';
+
+
+function getLine(state, line) {
+  var pos = state.bMarks[line] + state.blkIndent,
+      max = state.eMarks[line];
+
+  return state.src.substr(pos, max - pos);
+}
+
+function escapedSplit(str) {
+  var result = [],
+      pos = 0,
+      max = str.length,
+      ch,
+      escapes = 0,
+      lastPos = 0,
+      backTicked = false,
+      lastBackTick = 0;
+
+  ch  = str.charCodeAt(pos);
+
+  while (pos < max) {
+    if (ch === 0x60/* ` */ && (escapes % 2 === 0)) {
+      backTicked = !backTicked;
+      lastBackTick = pos;
+    } else if (ch === 0x7c/* | */ && (escapes % 2 === 0) && !backTicked) {
+      result.push(str.substring(lastPos, pos));
+      lastPos = pos + 1;
+    } else if (ch === 0x5c/* \ */) {
+      escapes++;
+    } else {
+      escapes = 0;
+    }
+
+    pos++;
+
+    // If there was an un-closed backtick, go back to just after
+    // the last backtick, but as if it was a normal character
+    if (pos === max && backTicked) {
+      backTicked = false;
+      pos = lastBackTick + 1;
+    }
+
+    ch = str.charCodeAt(pos);
+  }
+
+  result.push(str.substring(lastPos));
+
+  return result;
+}
+
+
+module.exports = function table(state, startLine, endLine, silent) {
+  var ch, lineText, pos, i, nextLine, columns, columnCount, token,
+      aligns, t, tableLines, tbodyLines;
+
+  // should have at least three lines
+  if (startLine + 2 > endLine) { return false; }
+
+  nextLine = startLine + 1;
+
+  if (state.sCount[nextLine] < state.blkIndent) { return false; }
+
+  // first character of the second line should be '|' or '-'
+
+  pos = state.bMarks[nextLine] + state.tShift[nextLine];
+  if (pos >= state.eMarks[nextLine]) { return false; }
+
+  ch = state.src.charCodeAt(pos);
+  if (ch !== 0x7C/* | */ && ch !== 0x2D/* - */ && ch !== 0x3A/* : */) { return false; }
+
+  lineText = getLine(state, startLine + 1);
+  if (!/^[-:| ]+$/.test(lineText)) { return false; }
+
+  columns = lineText.split('|');
+  aligns = [];
+  for (i = 0; i < columns.length; i++) {
+    t = columns[i].trim();
+    if (!t) {
+      // allow empty columns before and after table, but not in between columns;
+      // e.g. allow ` |---| `, disallow ` ---||--- `
+      if (i === 0 || i === columns.length - 1) {
+        continue;
+      } else {
+        return false;
+      }
+    }
+
+    if (!/^:?-+:?$/.test(t)) { return false; }
+    if (t.charCodeAt(t.length - 1) === 0x3A/* : */) {
+      aligns.push(t.charCodeAt(0) === 0x3A/* : */ ? 'center' : 'right');
+    } else if (t.charCodeAt(0) === 0x3A/* : */) {
+      aligns.push('left');
+    } else {
+      aligns.push('');
+    }
+  }
+
+  lineText = getLine(state, startLine).trim();
+  if (lineText.indexOf('|') === -1) { return false; }
+  columns = escapedSplit(lineText.replace(/^\||\|$/g, ''));
+
+  // header row will define an amount of columns in the entire table,
+  // and align row shouldn't be smaller than that (the rest of the rows can)
+  columnCount = columns.length;
+  if (columnCount > aligns.length) { return false; }
+
+  if (silent) { return true; }
+
+  token     = state.push('table_open', 'table', 1);
+  token.map = tableLines = [ startLine, 0 ];
+
+  token     = state.push('thead_open', 'thead', 1);
+  token.map = [ startLine, startLine + 1 ];
+
+  token     = state.push('tr_open', 'tr', 1);
+  token.map = [ startLine, startLine + 1 ];
+
+  for (i = 0; i < columns.length; i++) {
+    token          = state.push('th_open', 'th', 1);
+    token.map      = [ startLine, startLine + 1 ];
+    if (aligns[i]) {
+      token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ];
+    }
+
+    token          = state.push('inline', '', 0);
+    token.content  = columns[i].trim();
+    token.map      = [ startLine, startLine + 1 ];
+    token.children = [];
+
+    token          = state.push('th_close', 'th', -1);
+  }
+
+  token     = state.push('tr_close', 'tr', -1);
+  token     = state.push('thead_close', 'thead', -1);
+
+  token     = state.push('tbody_open', 'tbody', 1);
+  token.map = tbodyLines = [ startLine + 2, 0 ];
+
+  for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
+    if (state.sCount[nextLine] < state.blkIndent) { break; }
+
+    lineText = getLine(state, nextLine).trim();
+    if (lineText.indexOf('|') === -1) { break; }
+    columns = escapedSplit(lineText.replace(/^\||\|$/g, ''));
+
+    token = state.push('tr_open', 'tr', 1);
+    for (i = 0; i < columnCount; i++) {
+      token          = state.push('td_open', 'td', 1);
+      if (aligns[i]) {
+        token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ];
+      }
+
+      token          = state.push('inline', '', 0);
+      token.content  = columns[i] ? columns[i].trim() : '';
+      token.children = [];
+
+      token          = state.push('td_close', 'td', -1);
+    }
+    token = state.push('tr_close', 'tr', -1);
+  }
+  token = state.push('tbody_close', 'tbody', -1);
+  token = state.push('table_close', 'table', -1);
+
+  tableLines[1] = tbodyLines[1] = nextLine;
+  state.line = nextLine;
+  return true;
+};
+
+},{}],58:[function(require,module,exports){
+'use strict';
+
+
+module.exports = function block(state) {
+  var token;
+
+  if (state.inlineMode) {
+    token          = new state.Token('inline', '', 0);
+    token.content  = state.src;
+    token.map      = [ 0, 1 ];
+    token.children = [];
+    state.tokens.push(token);
+  } else {
+    state.md.block.parse(state.src, state.md, state.env, state.tokens);
+  }
+};
+
+},{}],59:[function(require,module,exports){
+'use strict';
+
+module.exports = function inline(state) {
+  var tokens = state.tokens, tok, i, l;
+
+  // Parse inlines
+  for (i = 0, l = tokens.length; i < l; i++) {
+    tok = tokens[i];
+    if (tok.type === 'inline') {
+      state.md.inline.parse(tok.content, state.md, state.env, tok.children);
+    }
+  }
+};
+
+},{}],60:[function(require,module,exports){
+// Replace link-like texts with link nodes.
+//
+// Currently restricted by `md.validateLink()` to http/https/ftp
+//
+'use strict';
+
+
+var arrayReplaceAt = require('../common/utils').arrayReplaceAt;
+
+
+function isLinkOpen(str) {
+  return /^<a[>\s]/i.test(str);
+}
+function isLinkClose(str) {
+  return /^<\/a\s*>/i.test(str);
+}
+
+
+module.exports = function linkify(state) {
+  var i, j, l, tokens, token, currentToken, nodes, ln, text, pos, lastPos,
+      level, htmlLinkLevel, url, fullUrl, urlText,
+      blockTokens = state.tokens,
+      links;
+
+  if (!state.md.options.linkify) { return; }
+
+  for (j = 0, l = blockTokens.length; j < l; j++) {
+    if (blockTokens[j].type !== 'inline' ||
+        !state.md.linkify.pretest(blockTokens[j].content)) {
+      continue;
+    }
+
+    tokens = blockTokens[j].children;
+
+    htmlLinkLevel = 0;
+
+    // We scan from the end, to keep position when new tags added.
+    // Use reversed logic in links start/end match
+    for (i = tokens.length - 1; i >= 0; i--) {
+      currentToken = tokens[i];
+
+      // Skip content of markdown links
+      if (currentToken.type === 'link_close') {
+        i--;
+        while (tokens[i].level !== currentToken.level && tokens[i].type !== 'link_open') {
+          i--;
+        }
+        continue;
+      }
+
+      // Skip content of html tag links
+      if (currentToken.type === 'html_inline') {
+        if (isLinkOpen(currentToken.content) && htmlLinkLevel > 0) {
+          htmlLinkLevel--;
+        }
+        if (isLinkClose(currentToken.content)) {
+          htmlLinkLevel++;
+        }
+      }
+      if (htmlLinkLevel > 0) { continue; }
+
+      if (currentToken.type === 'text' && state.md.linkify.test(currentToken.content)) {
+
+        text = currentToken.content;
+        links = state.md.linkify.match(text);
+
+        // Now split string to nodes
+        nodes = [];
+        level = currentToken.level;
+        lastPos = 0;
+
+        for (ln = 0; ln < links.length; ln++) {
+
+          url = links[ln].url;
+          fullUrl = state.md.normalizeLink(url);
+          if (!state.md.validateLink(fullUrl)) { continue; }
+
+          urlText = links[ln].text;
+
+          // Linkifier might send raw hostnames like "example.com", where url
+          // starts with domain name. So we prepend http:// in those cases,
+          // and remove it afterwards.
+          //
+          if (!links[ln].schema) {
+            urlText = state.md.normalizeLinkText('http://' + urlText).replace(/^http:\/\//, '');
+          } else if (links[ln].schema === 'mailto:' && !/^mailto:/i.test(urlText)) {
+            urlText = state.md.normalizeLinkText('mailto:' + urlText).replace(/^mailto:/, '');
+          } else {
+            urlText = state.md.normalizeLinkText(urlText);
+          }
+
+          pos = links[ln].index;
+
+          if (pos > lastPos) {
+            token         = new state.Token('text', '', 0);
+            token.content = text.slice(lastPos, pos);
+            token.level   = level;
+            nodes.push(token);
+          }
+
+          token         = new state.Token('link_open', 'a', 1);
+          token.attrs   = [ [ 'href', fullUrl ] ];
+          token.level   = level++;
+          token.markup  = 'linkify';
+          token.info    = 'auto';
+          nodes.push(token);
+
+          token         = new state.Token('text', '', 0);
+          token.content = urlText;
+          token.level   = level;
+          nodes.push(token);
+
+          token         = new state.Token('link_close', 'a', -1);
+          token.level   = --level;
+          token.markup  = 'linkify';
+          token.info    = 'auto';
+          nodes.push(token);
+
+          lastPos = links[ln].lastIndex;
+        }
+        if (lastPos < text.length) {
+          token         = new state.Token('text', '', 0);
+          token.content = text.slice(lastPos);
+          token.level   = level;
+          nodes.push(token);
+        }
+
+        // replace current node
+        blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
+      }
+    }
+  }
+};
+
+},{"../common/utils":32}],61:[function(require,module,exports){
+// Normalize input string
+
+'use strict';
+
+
+var NEWLINES_RE  = /\r[\n\u0085]|[\u2424\u2028\u0085]/g;
+var NULL_RE      = /\u0000/g;
+
+
+module.exports = function inline(state) {
+  var str;
+
+  // Normalize newlines
+  str = state.src.replace(NEWLINES_RE, '\n');
+
+  // Replace NULL characters
+  str = str.replace(NULL_RE, '\uFFFD');
+
+  state.src = str;
+};
+
+},{}],62:[function(require,module,exports){
+// Simple typographyc replacements
+//
+// (c) (C) → ©
+// (tm) (TM) → ™
+// (r) (R) → ®
+// +- → ±
+// (p) (P) -> §
+// ... → … (also ?.... → ?.., !.... → !..)
+// ???????? → ???, !!!!! → !!!, `,,` → `,`
+// -- → &ndash;, --- → &mdash;
+//
+'use strict';
+
+// TODO:
+// - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
+// - miltiplication 2 x 4 -> 2 × 4
+
+var RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;
+
+// Workaround for phantomjs - need regex without /g flag,
+// or root check will fail every second time
+var SCOPED_ABBR_TEST_RE = /\((c|tm|r|p)\)/i;
+
+var SCOPED_ABBR_RE = /\((c|tm|r|p)\)/ig;
+var SCOPED_ABBR = {
+  'c': '©',
+  'r': '®',
+  'p': '§',
+  'tm': '™'
+};
+
+function replaceFn(match, name) {
+  return SCOPED_ABBR[name.toLowerCase()];
+}
+
+function replace_scoped(inlineTokens) {
+  var i, token;
+
+  for (i = inlineTokens.length - 1; i >= 0; i--) {
+    token = inlineTokens[i];
+    if (token.type === 'text') {
+      token.content = token.content.replace(SCOPED_ABBR_RE, replaceFn);
+    }
+  }
+}
+
+function replace_rare(inlineTokens) {
+  var i, token;
+
+  for (i = inlineTokens.length - 1; i >= 0; i--) {
+    token = inlineTokens[i];
+    if (token.type === 'text') {
+      if (RARE_RE.test(token.content)) {
+        token.content = token.content
+                    .replace(/\+-/g, '±')
+                    // .., ..., ....... -> …
+                    // but ?..... & !..... -> ?.. & !..
+                    .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
+                    .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',')
+                    // em-dash
+                    .replace(/(^|[^-])---([^-]|$)/mg, '$1\u2014$2')
+                    // en-dash
+                    .replace(/(^|\s)--(\s|$)/mg, '$1\u2013$2')
+                    .replace(/(^|[^-\s])--([^-\s]|$)/mg, '$1\u2013$2');
+      }
+    }
+  }
+}
+
+
+module.exports = function replace(state) {
+  var blkIdx;
+
+  if (!state.md.options.typographer) { return; }
+
+  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
+
+    if (state.tokens[blkIdx].type !== 'inline') { continue; }
+
+    if (SCOPED_ABBR_TEST_RE.test(state.tokens[blkIdx].content)) {
+      replace_scoped(state.tokens[blkIdx].children);
+    }
+
+    if (RARE_RE.test(state.tokens[blkIdx].content)) {
+      replace_rare(state.tokens[blkIdx].children);
+    }
+
+  }
+};
+
+},{}],63:[function(require,module,exports){
+// Convert straight quotation marks to typographic ones
+//
+'use strict';
+
+
+var isWhiteSpace   = require('../common/utils').isWhiteSpace;
+var isPunctChar    = require('../common/utils').isPunctChar;
+var isMdAsciiPunct = require('../common/utils').isMdAsciiPunct;
+
+var QUOTE_TEST_RE = /['"]/;
+var QUOTE_RE = /['"]/g;
+var APOSTROPHE = '\u2019'; /* ’ */
+
+
+function replaceAt(str, index, ch) {
+  return str.substr(0, index) + ch + str.substr(index + 1);
+}
+
+function process_inlines(tokens, state) {
+  var i, token, text, t, pos, max, thisLevel, item, lastChar, nextChar,
+      isLastPunctChar, isNextPunctChar, isLastWhiteSpace, isNextWhiteSpace,
+      canOpen, canClose, j, isSingle, stack, openQuote, closeQuote;
+
+  stack = [];
+
+  for (i = 0; i < tokens.length; i++) {
+    token = tokens[i];
+
+    thisLevel = tokens[i].level;
+
+    for (j = stack.length - 1; j >= 0; j--) {
+      if (stack[j].level <= thisLevel) { break; }
+    }
+    stack.length = j + 1;
+
+    if (token.type !== 'text') { continue; }
+
+    text = token.content;
+    pos = 0;
+    max = text.length;
+
+    /*eslint no-labels:0,block-scoped-var:0*/
+    OUTER:
+    while (pos < max) {
+      QUOTE_RE.lastIndex = pos;
+      t = QUOTE_RE.exec(text);
+      if (!t) { break; }
+
+      canOpen = canClose = true;
+      pos = t.index + 1;
+      isSingle = (t[0] === "'");
+
+      // Find previous character,
+      // default to space if it's the beginning of the line
+      //
+      lastChar = 0x20;
+
+      if (t.index - 1 >= 0) {
+        lastChar = text.charCodeAt(t.index - 1);
+      } else {
+        for (j = i - 1; j >= 0; j--) {
+          if (tokens[j].type !== 'text') { continue; }
+
+          lastChar = tokens[j].content.charCodeAt(tokens[j].content.length - 1);
+          break;
+        }
+      }
+
+      // Find next character,
+      // default to space if it's the end of the line
+      //
+      nextChar = 0x20;
+
+      if (pos < max) {
+        nextChar = text.charCodeAt(pos);
+      } else {
+        for (j = i + 1; j < tokens.length; j++) {
+          if (tokens[j].type !== 'text') { continue; }
+
+          nextChar = tokens[j].content.charCodeAt(0);
+          break;
+        }
+      }
+
+      isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
+      isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
+
+      isLastWhiteSpace = isWhiteSpace(lastChar);
+      isNextWhiteSpace = isWhiteSpace(nextChar);
+
+      if (isNextWhiteSpace) {
+        canOpen = false;
+      } else if (isNextPunctChar) {
+        if (!(isLastWhiteSpace || isLastPunctChar)) {
+          canOpen = false;
+        }
+      }
+
+      if (isLastWhiteSpace) {
+        canClose = false;
+      } else if (isLastPunctChar) {
+        if (!(isNextWhiteSpace || isNextPunctChar)) {
+          canClose = false;
+        }
+      }
+
+      if (nextChar === 0x22 /* " */ && t[0] === '"') {
+        if (lastChar >= 0x30 /* 0 */ && lastChar <= 0x39 /* 9 */) {
+          // special case: 1"" - count first quote as an inch
+          canClose = canOpen = false;
+        }
+      }
+
+      if (canOpen && canClose) {
+        // treat this as the middle of the word
+        canOpen = false;
+        canClose = isNextPunctChar;
+      }
+
+      if (!canOpen && !canClose) {
+        // middle of word
+        if (isSingle) {
+          token.content = replaceAt(token.content, t.index, APOSTROPHE);
+        }
+        continue;
+      }
+
+      if (canClose) {
+        // this could be a closing quote, rewind the stack to get a match
+        for (j = stack.length - 1; j >= 0; j--) {
+          item = stack[j];
+          if (stack[j].level < thisLevel) { break; }
+          if (item.single === isSingle && stack[j].level === thisLevel) {
+            item = stack[j];
+
+            if (isSingle) {
+              openQuote = state.md.options.quotes[2];
+              closeQuote = state.md.options.quotes[3];
+            } else {
+              openQuote = state.md.options.quotes[0];
+              closeQuote = state.md.options.quotes[1];
+            }
+
+            // replace token.content *before* tokens[item.token].content,
+            // because, if they are pointing at the same token, replaceAt
+            // could mess up indices when quote length != 1
+            token.content = replaceAt(token.content, t.index, closeQuote);
+            tokens[item.token].content = replaceAt(
+              tokens[item.token].content, item.pos, openQuote);
+
+            pos += closeQuote.length - 1;
+            if (item.token === i) { pos += openQuote.length - 1; }
+
+            text = token.content;
+            max = text.length;
+
+            stack.length = j;
+            continue OUTER;
+          }
+        }
+      }
+
+      if (canOpen) {
+        stack.push({
+          token: i,
+          pos: t.index,
+          single: isSingle,
+          level: thisLevel
+        });
+      } else if (canClose && isSingle) {
+        token.content = replaceAt(token.content, t.index, APOSTROPHE);
+      }
+    }
+  }
+}
+
+
+module.exports = function smartquotes(state) {
+  /*eslint max-depth:0*/
+  var blkIdx;
+
+  if (!state.md.options.typographer) { return; }
+
+  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
+
+    if (state.tokens[blkIdx].type !== 'inline' ||
+        !QUOTE_TEST_RE.test(state.tokens[blkIdx].content)) {
+      continue;
+    }
+
+    process_inlines(state.tokens[blkIdx].children, state);
+  }
+};
+
+},{"../common/utils":32}],64:[function(require,module,exports){
+// Core state object
+//
+'use strict';
+
+var Token = require('../token');
+
+
+function StateCore(src, md, env) {
+  this.src = src;
+  this.env = env;
+  this.tokens = [];
+  this.inlineMode = false;
+  this.md = md; // link to parser instance
+}
+
+// re-export Token class to use in core rules
+StateCore.prototype.Token = Token;
+
+
+module.exports = StateCore;
+
+},{"../token":79}],65:[function(require,module,exports){
+// Process autolinks '<protocol:...>'
+
+'use strict';
+
+
+/*eslint max-len:0*/
+var EMAIL_RE    = /^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/;
+var AUTOLINK_RE = /^<([a-zA-Z][a-zA-Z0-9+.\-]{1,31}):([^<>\x00-\x20]*)>/;
+
+
+module.exports = function autolink(state, silent) {
+  var tail, linkMatch, emailMatch, url, fullUrl, token,
+      pos = state.pos;
+
+  if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }
+
+  tail = state.src.slice(pos);
+
+  if (tail.indexOf('>') < 0) { return false; }
+
+  if (AUTOLINK_RE.test(tail)) {
+    linkMatch = tail.match(AUTOLINK_RE);
+
+    url = linkMatch[0].slice(1, -1);
+    fullUrl = state.md.normalizeLink(url);
+    if (!state.md.validateLink(fullUrl)) { return false; }
+
+    if (!silent) {
+      token         = state.push('link_open', 'a', 1);
+      token.attrs   = [ [ 'href', fullUrl ] ];
+      token.markup  = 'autolink';
+      token.info    = 'auto';
+
+      token         = state.push('text', '', 0);
+      token.content = state.md.normalizeLinkText(url);
+
+      token         = state.push('link_close', 'a', -1);
+      token.markup  = 'autolink';
+      token.info    = 'auto';
+    }
+
+    state.pos += linkMatch[0].length;
+    return true;
+  }
+
+  if (EMAIL_RE.test(tail)) {
+    emailMatch = tail.match(EMAIL_RE);
+
+    url = emailMatch[0].slice(1, -1);
+    fullUrl = state.md.normalizeLink('mailto:' + url);
+    if (!state.md.validateLink(fullUrl)) { return false; }
+
+    if (!silent) {
+      token         = state.push('link_open', 'a', 1);
+      token.attrs   = [ [ 'href', fullUrl ] ];
+      token.markup  = 'autolink';
+      token.info    = 'auto';
+
+      token         = state.push('text', '', 0);
+      token.content = state.md.normalizeLinkText(url);
+
+      token         = state.push('link_close', 'a', -1);
+      token.markup  = 'autolink';
+      token.info    = 'auto';
+    }
+
+    state.pos += emailMatch[0].length;
+    return true;
+  }
+
+  return false;
+};
+
+},{}],66:[function(require,module,exports){
+// Parse backticks
+
+'use strict';
+
+module.exports = function backtick(state, silent) {
+  var start, max, marker, matchStart, matchEnd, token,
+      pos = state.pos,
+      ch = state.src.charCodeAt(pos);
+
+  if (ch !== 0x60/* ` */) { return false; }
+
+  start = pos;
+  pos++;
+  max = state.posMax;
+
+  while (pos < max && state.src.charCodeAt(pos) === 0x60/* ` */) { pos++; }
+
+  marker = state.src.slice(start, pos);
+
+  matchStart = matchEnd = pos;
+
+  while ((matchStart = state.src.indexOf('`', matchEnd)) !== -1) {
+    matchEnd = matchStart + 1;
+
+    while (matchEnd < max && state.src.charCodeAt(matchEnd) === 0x60/* ` */) { matchEnd++; }
+
+    if (matchEnd - matchStart === marker.length) {
+      if (!silent) {
+        token         = state.push('code_inline', 'code', 0);
+        token.markup  = marker;
+        token.content = state.src.slice(pos, matchStart)
+                                 .replace(/[ \n]+/g, ' ')
+                                 .trim();
+      }
+      state.pos = matchEnd;
+      return true;
+    }
+  }
+
+  if (!silent) { state.pending += marker; }
+  state.pos += marker.length;
+  return true;
+};
+
+},{}],67:[function(require,module,exports){
+// For each opening emphasis-like marker find a matching closing one
+//
+'use strict';
+
+
+module.exports = function link_pairs(state) {
+  var i, j, lastDelim, currDelim,
+      delimiters = state.delimiters,
+      max = state.delimiters.length;
+
+  for (i = 0; i < max; i++) {
+    lastDelim = delimiters[i];
+
+    if (!lastDelim.close) { continue; }
+
+    j = i - lastDelim.jump - 1;
+
+    while (j >= 0) {
+      currDelim = delimiters[j];
+
+      if (currDelim.open &&
+          currDelim.marker === lastDelim.marker &&
+          currDelim.end < 0 &&
+          currDelim.level === lastDelim.level) {
+
+        lastDelim.jump = i - j;
+        lastDelim.open = false;
+        currDelim.end  = i;
+        currDelim.jump = 0;
+        break;
+      }
+
+      j -= currDelim.jump + 1;
+    }
+  }
+};
+
+},{}],68:[function(require,module,exports){
+// Process *this* and _that_
+//
+'use strict';
+
+
+// Insert each marker as a separate text token, and add it to delimiter list
+//
+module.exports.tokenize = function emphasis(state, silent) {
+  var i, scanned, token,
+      start = state.pos,
+      marker = state.src.charCodeAt(start);
+
+  if (silent) { return false; }
+
+  if (marker !== 0x5F /* _ */ && marker !== 0x2A /* * */) { return false; }
+
+  scanned = state.scanDelims(state.pos, marker === 0x2A);
+
+  for (i = 0; i < scanned.length; i++) {
+    token         = state.push('text', '', 0);
+    token.content = String.fromCharCode(marker);
+
+    state.delimiters.push({
+      // Char code of the starting marker (number).
+      //
+      marker: marker,
+
+      // An amount of characters before this one that's equivalent to
+      // current one. In plain English: if this delimiter does not open
+      // an emphasis, neither do previous `jump` characters.
+      //
+      // Used to skip sequences like "*****" in one step, for 1st asterisk
+      // value will be 0, for 2nd it's 1 and so on.
+      //
+      jump:   i,
+
+      // A position of the token this delimiter corresponds to.
+      //
+      token:  state.tokens.length - 1,
+
+      // Token level.
+      //
+      level:  state.level,
+
+      // If this delimiter is matched as a valid opener, `end` will be
+      // equal to its position, otherwise it's `-1`.
+      //
+      end:    -1,
+
+      // Boolean flags that determine if this delimiter could open or close
+      // an emphasis.
+      //
+      open:   scanned.can_open,
+      close:  scanned.can_close
+    });
+  }
+
+  state.pos += scanned.length;
+
+  return true;
+};
+
+
+// Walk through delimiter list and replace text tokens with tags
+//
+module.exports.postProcess = function emphasis(state) {
+  var i,
+      startDelim,
+      endDelim,
+      token,
+      ch,
+      isStrong,
+      delimiters = state.delimiters,
+      max = state.delimiters.length;
+
+  for (i = 0; i < max; i++) {
+    startDelim = delimiters[i];
+
+    if (startDelim.marker !== 0x5F/* _ */ && startDelim.marker !== 0x2A/* * */) {
+      continue;
+    }
+
+    // Process only opening markers
+    if (startDelim.end === -1) {
+      continue;
+    }
+
+    endDelim = delimiters[startDelim.end];
+
+    // If the next delimiter has the same marker and is adjacent to this one,
+    // merge those into one strong delimiter.
+    //
+    // `<em><em>whatever</em></em>` -> `<strong>whatever</strong>`
+    //
+    isStrong = i + 1 < max &&
+               delimiters[i + 1].end === startDelim.end - 1 &&
+               delimiters[i + 1].token === startDelim.token + 1 &&
+               delimiters[startDelim.end - 1].token === endDelim.token - 1 &&
+               delimiters[i + 1].marker === startDelim.marker;
+
+    ch = String.fromCharCode(startDelim.marker);
+
+    token         = state.tokens[startDelim.token];
+    token.type    = isStrong ? 'strong_open' : 'em_open';
+    token.tag     = isStrong ? 'strong' : 'em';
+    token.nesting = 1;
+    token.markup  = isStrong ? ch + ch : ch;
+    token.content = '';
+
+    token         = state.tokens[endDelim.token];
+    token.type    = isStrong ? 'strong_close' : 'em_close';
+    token.tag     = isStrong ? 'strong' : 'em';
+    token.nesting = -1;
+    token.markup  = isStrong ? ch + ch : ch;
+    token.content = '';
+
+    if (isStrong) {
+      state.tokens[delimiters[i + 1].token].content = '';
+      state.tokens[delimiters[startDelim.end - 1].token].content = '';
+      i++;
+    }
+  }
+};
+
+},{}],69:[function(require,module,exports){
+// Process html entity - &#123;, &#xAF;, &quot;, ...
+
+'use strict';
+
+var entities          = require('../common/entities');
+var has               = require('../common/utils').has;
+var isValidEntityCode = require('../common/utils').isValidEntityCode;
+var fromCodePoint     = require('../common/utils').fromCodePoint;
+
+
+var DIGITAL_RE = /^&#((?:x[a-f0-9]{1,8}|[0-9]{1,8}));/i;
+var NAMED_RE   = /^&([a-z][a-z0-9]{1,31});/i;
+
+
+module.exports = function entity(state, silent) {
+  var ch, code, match, pos = state.pos, max = state.posMax;
+
+  if (state.src.charCodeAt(pos) !== 0x26/* & */) { return false; }
+
+  if (pos + 1 < max) {
+    ch = state.src.charCodeAt(pos + 1);
+
+    if (ch === 0x23 /* # */) {
+      match = state.src.slice(pos).match(DIGITAL_RE);
+      if (match) {
+        if (!silent) {
+          code = match[1][0].toLowerCase() === 'x' ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10);
+          state.pending += isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(0xFFFD);
+        }
+        state.pos += match[0].length;
+        return true;
+      }
+    } else {
+      match = state.src.slice(pos).match(NAMED_RE);
+      if (match) {
+        if (has(entities, match[1])) {
+          if (!silent) { state.pending += entities[match[1]]; }
+          state.pos += match[0].length;
+          return true;
+        }
+      }
+    }
+  }
+
+  if (!silent) { state.pending += '&'; }
+  state.pos++;
+  return true;
+};
+
+},{"../common/entities":29,"../common/utils":32}],70:[function(require,module,exports){
+// Proceess escaped chars and hardbreaks
+
+'use strict';
+
+var isSpace = require('../common/utils').isSpace;
+
+var ESCAPED = [];
+
+for (var i = 0; i < 256; i++) { ESCAPED.push(0); }
+
+'\\!"#$%&\'()*+,./:;<=>?@[]^_`{|}~-'
+  .split('').forEach(function(ch) { ESCAPED[ch.charCodeAt(0)] = 1; });
+
+
+module.exports = function escape(state, silent) {
+  var ch, pos = state.pos, max = state.posMax;
+
+  if (state.src.charCodeAt(pos) !== 0x5C/* \ */) { return false; }
+
+  pos++;
+
+  if (pos < max) {
+    ch = state.src.charCodeAt(pos);
+
+    if (ch < 256 && ESCAPED[ch] !== 0) {
+      if (!silent) { state.pending += state.src[pos]; }
+      state.pos += 2;
+      return true;
+    }
+
+    if (ch === 0x0A) {
+      if (!silent) {
+        state.push('hardbreak', 'br', 0);
+      }
+
+      pos++;
+      // skip leading whitespaces from next line
+      while (pos < max) {
+        ch = state.src.charCodeAt(pos);
+        if (!isSpace(ch)) { break; }
+        pos++;
+      }
+
+      state.pos = pos;
+      return true;
+    }
+  }
+
+  if (!silent) { state.pending += '\\'; }
+  state.pos++;
+  return true;
+};
+
+},{"../common/utils":32}],71:[function(require,module,exports){
+// Process html tags
+
+'use strict';
+
+
+var HTML_TAG_RE = require('../common/html_re').HTML_TAG_RE;
+
+
+function isLetter(ch) {
+  /*eslint no-bitwise:0*/
+  var lc = ch | 0x20; // to lower case
+  return (lc >= 0x61/* a */) && (lc <= 0x7a/* z */);
+}
+
+
+module.exports = function html_inline(state, silent) {
+  var ch, match, max, token,
+      pos = state.pos;
+
+  if (!state.md.options.html) { return false; }
+
+  // Check start
+  max = state.posMax;
+  if (state.src.charCodeAt(pos) !== 0x3C/* < */ ||
+      pos + 2 >= max) {
+    return false;
+  }
+
+  // Quick fail on second char
+  ch = state.src.charCodeAt(pos + 1);
+  if (ch !== 0x21/* ! */ &&
+      ch !== 0x3F/* ? */ &&
+      ch !== 0x2F/* / */ &&
+      !isLetter(ch)) {
+    return false;
+  }
+
+  match = state.src.slice(pos).match(HTML_TAG_RE);
+  if (!match) { return false; }
+
+  if (!silent) {
+    token         = state.push('html_inline', '', 0);
+    token.content = state.src.slice(pos, pos + match[0].length);
+  }
+  state.pos += match[0].length;
+  return true;
+};
+
+},{"../common/html_re":31}],72:[function(require,module,exports){
+// Process ![image](<src> "title")
+
+'use strict';
+
+var parseLinkLabel       = require('../helpers/parse_link_label');
+var parseLinkDestination = require('../helpers/parse_link_destination');
+var parseLinkTitle       = require('../helpers/parse_link_title');
+var normalizeReference   = require('../common/utils').normalizeReference;
+var isSpace              = require('../common/utils').isSpace;
+
+
+module.exports = function image(state, silent) {
+  var attrs,
+      code,
+      content,
+      label,
+      labelEnd,
+      labelStart,
+      pos,
+      ref,
+      res,
+      title,
+      token,
+      tokens,
+      start,
+      href = '',
+      oldPos = state.pos,
+      max = state.posMax;
+
+  if (state.src.charCodeAt(state.pos) !== 0x21/* ! */) { return false; }
+  if (state.src.charCodeAt(state.pos + 1) !== 0x5B/* [ */) { return false; }
+
+  labelStart = state.pos + 2;
+  labelEnd = parseLinkLabel(state, state.pos + 1, false);
+
+  // parser failed to find ']', so it's not a valid link
+  if (labelEnd < 0) { return false; }
+
+  pos = labelEnd + 1;
+  if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
+    //
+    // Inline link
+    //
+
+    // [link](  <href>  "title"  )
+    //        ^^ skipping these spaces
+    pos++;
+    for (; pos < max; pos++) {
+      code = state.src.charCodeAt(pos);
+      if (!isSpace(code) && code !== 0x0A) { break; }
+    }
+    if (pos >= max) { return false; }
+
+    // [link](  <href>  "title"  )
+    //          ^^^^^^ parsing link destination
+    start = pos;
+    res = parseLinkDestination(state.src, pos, state.posMax);
+    if (res.ok) {
+      href = state.md.normalizeLink(res.str);
+      if (state.md.validateLink(href)) {
+        pos = res.pos;
+      } else {
+        href = '';
+      }
+    }
+
+    // [link](  <href>  "title"  )
+    //                ^^ skipping these spaces
+    start = pos;
+    for (; pos < max; pos++) {
+      code = state.src.charCodeAt(pos);
+      if (!isSpace(code) && code !== 0x0A) { break; }
+    }
+
+    // [link](  <href>  "title"  )
+    //                  ^^^^^^^ parsing link title
+    res = parseLinkTitle(state.src, pos, state.posMax);
+    if (pos < max && start !== pos && res.ok) {
+      title = res.str;
+      pos = res.pos;
+
+      // [link](  <href>  "title"  )
+      //                         ^^ skipping these spaces
+      for (; pos < max; pos++) {
+        code = state.src.charCodeAt(pos);
+        if (!isSpace(code) && code !== 0x0A) { break; }
+      }
+    } else {
+      title = '';
+    }
+
+    if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
+      state.pos = oldPos;
+      return false;
+    }
+    pos++;
+  } else {
+    //
+    // Link reference
+    //
+    if (typeof state.env.references === 'undefined') { return false; }
+
+    if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
+      start = pos + 1;
+      pos = parseLinkLabel(state, pos);
+      if (pos >= 0) {
+        label = state.src.slice(start, pos++);
+      } else {
+        pos = labelEnd + 1;
+      }
+    } else {
+      pos = labelEnd + 1;
+    }
+
+    // covers label === '' and label === undefined
+    // (collapsed reference link and shortcut reference link respectively)
+    if (!label) { label = state.src.slice(labelStart, labelEnd); }
+
+    ref = state.env.references[normalizeReference(label)];
+    if (!ref) {
+      state.pos = oldPos;
+      return false;
+    }
+    href = ref.href;
+    title = ref.title;
+  }
+
+  //
+  // We found the end of the link, and know for a fact it's a valid link;
+  // so all that's left to do is to call tokenizer.
+  //
+  if (!silent) {
+    content = state.src.slice(labelStart, labelEnd);
+
+    state.md.inline.parse(
+      content,
+      state.md,
+      state.env,
+      tokens = []
+    );
+
+    token          = state.push('image', 'img', 0);
+    token.attrs    = attrs = [ [ 'src', href ], [ 'alt', '' ] ];
+    token.children = tokens;
+    token.content  = content;
+
+    if (title) {
+      attrs.push([ 'title', title ]);
+    }
+  }
+
+  state.pos = pos;
+  state.posMax = max;
+  return true;
+};
+
+},{"../common/utils":32,"../helpers/parse_link_destination":34,"../helpers/parse_link_label":35,"../helpers/parse_link_title":36}],73:[function(require,module,exports){
+// Process [link](<to> "stuff")
+
+'use strict';
+
+var parseLinkLabel       = require('../helpers/parse_link_label');
+var parseLinkDestination = require('../helpers/parse_link_destination');
+var parseLinkTitle       = require('../helpers/parse_link_title');
+var normalizeReference   = require('../common/utils').normalizeReference;
+var isSpace              = require('../common/utils').isSpace;
+
+
+module.exports = function link(state, silent) {
+  var attrs,
+      code,
+      label,
+      labelEnd,
+      labelStart,
+      pos,
+      res,
+      ref,
+      title,
+      token,
+      href = '',
+      oldPos = state.pos,
+      max = state.posMax,
+      start = state.pos;
+
+  if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }
+
+  labelStart = state.pos + 1;
+  labelEnd = parseLinkLabel(state, state.pos, true);
+
+  // parser failed to find ']', so it's not a valid link
+  if (labelEnd < 0) { return false; }
+
+  pos = labelEnd + 1;
+  if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
+    //
+    // Inline link
+    //
+
+    // [link](  <href>  "title"  )
+    //        ^^ skipping these spaces
+    pos++;
+    for (; pos < max; pos++) {
+      code = state.src.charCodeAt(pos);
+      if (!isSpace(code) && code !== 0x0A) { break; }
+    }
+    if (pos >= max) { return false; }
+
+    // [link](  <href>  "title"  )
+    //          ^^^^^^ parsing link destination
+    start = pos;
+    res = parseLinkDestination(state.src, pos, state.posMax);
+    if (res.ok) {
+      href = state.md.normalizeLink(res.str);
+      if (state.md.validateLink(href)) {
+        pos = res.pos;
+      } else {
+        href = '';
+      }
+    }
+
+    // [link](  <href>  "title"  )
+    //                ^^ skipping these spaces
+    start = pos;
+    for (; pos < max; pos++) {
+      code = state.src.charCodeAt(pos);
+      if (!isSpace(code) && code !== 0x0A) { break; }
+    }
+
+    // [link](  <href>  "title"  )
+    //                  ^^^^^^^ parsing link title
+    res = parseLinkTitle(state.src, pos, state.posMax);
+    if (pos < max && start !== pos && res.ok) {
+      title = res.str;
+      pos = res.pos;
+
+      // [link](  <href>  "title"  )
+      //                         ^^ skipping these spaces
+      for (; pos < max; pos++) {
+        code = state.src.charCodeAt(pos);
+        if (!isSpace(code) && code !== 0x0A) { break; }
+      }
+    } else {
+      title = '';
+    }
+
+    if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
+      state.pos = oldPos;
+      return false;
+    }
+    pos++;
+  } else {
+    //
+    // Link reference
+    //
+    if (typeof state.env.references === 'undefined') { return false; }
+
+    if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
+      start = pos + 1;
+      pos = parseLinkLabel(state, pos);
+      if (pos >= 0) {
+        label = state.src.slice(start, pos++);
+      } else {
+        pos = labelEnd + 1;
+      }
+    } else {
+      pos = labelEnd + 1;
+    }
+
+    // covers label === '' and label === undefined
+    // (collapsed reference link and shortcut reference link respectively)
+    if (!label) { label = state.src.slice(labelStart, labelEnd); }
+
+    ref = state.env.references[normalizeReference(label)];
+    if (!ref) {
+      state.pos = oldPos;
+      return false;
+    }
+    href = ref.href;
+    title = ref.title;
+  }
+
+  //
+  // We found the end of the link, and know for a fact it's a valid link;
+  // so all that's left to do is to call tokenizer.
+  //
+  if (!silent) {
+    state.pos = labelStart;
+    state.posMax = labelEnd;
+
+    token        = state.push('link_open', 'a', 1);
+    token.attrs  = attrs = [ [ 'href', href ] ];
+    if (title) {
+      attrs.push([ 'title', title ]);
+    }
+
+    state.md.inline.tokenize(state);
+
+    token        = state.push('link_close', 'a', -1);
+  }
+
+  state.pos = pos;
+  state.posMax = max;
+  return true;
+};
+
+},{"../common/utils":32,"../helpers/parse_link_destination":34,"../helpers/parse_link_label":35,"../helpers/parse_link_title":36}],74:[function(require,module,exports){
+// Proceess '\n'
+
+'use strict';
+
+module.exports = function newline(state, silent) {
+  var pmax, max, pos = state.pos;
+
+  if (state.src.charCodeAt(pos) !== 0x0A/* \n */) { return false; }
+
+  pmax = state.pending.length - 1;
+  max = state.posMax;
+
+  // '  \n' -> hardbreak
+  // Lookup in pending chars is bad practice! Don't copy to other rules!
+  // Pending string is stored in concat mode, indexed lookups will cause
+  // convertion to flat mode.
+  if (!silent) {
+    if (pmax >= 0 && state.pending.charCodeAt(pmax) === 0x20) {
+      if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 0x20) {
+        state.pending = state.pending.replace(/ +$/, '');
+        state.push('hardbreak', 'br', 0);
+      } else {
+        state.pending = state.pending.slice(0, -1);
+        state.push('softbreak', 'br', 0);
+      }
+
+    } else {
+      state.push('softbreak', 'br', 0);
+    }
+  }
+
+  pos++;
+
+  // skip heading spaces for next line
+  while (pos < max && state.src.charCodeAt(pos) === 0x20) { pos++; }
+
+  state.pos = pos;
+  return true;
+};
+
+},{}],75:[function(require,module,exports){
+// Inline parser state
+
+'use strict';
+
+
+var Token          = require('../token');
+var isWhiteSpace   = require('../common/utils').isWhiteSpace;
+var isPunctChar    = require('../common/utils').isPunctChar;
+var isMdAsciiPunct = require('../common/utils').isMdAsciiPunct;
+
+
+function StateInline(src, md, env, outTokens) {
+  this.src = src;
+  this.env = env;
+  this.md = md;
+  this.tokens = outTokens;
+
+  this.pos = 0;
+  this.posMax = this.src.length;
+  this.level = 0;
+  this.pending = '';
+  this.pendingLevel = 0;
+
+  this.cache = {};        // Stores { start: end } pairs. Useful for backtrack
+                          // optimization of pairs parse (emphasis, strikes).
+
+  this.delimiters = [];   // Emphasis-like delimiters
+}
+
+
+// Flush pending text
+//
+StateInline.prototype.pushPending = function () {
+  var token = new Token('text', '', 0);
+  token.content = this.pending;
+  token.level = this.pendingLevel;
+  this.tokens.push(token);
+  this.pending = '';
+  return token;
+};
+
+
+// Push new token to "stream".
+// If pending text exists - flush it as text token
+//
+StateInline.prototype.push = function (type, tag, nesting) {
+  if (this.pending) {
+    this.pushPending();
+  }
+
+  var token = new Token(type, tag, nesting);
+
+  if (nesting < 0) { this.level--; }
+  token.level = this.level;
+  if (nesting > 0) { this.level++; }
+
+  this.pendingLevel = this.level;
+  this.tokens.push(token);
+  return token;
+};
+
+
+// Scan a sequence of emphasis-like markers, and determine whether
+// it can start an emphasis sequence or end an emphasis sequence.
+//
+//  - start - position to scan from (it should point at a valid marker);
+//  - canSplitWord - determine if these markers can be found inside a word
+//
+StateInline.prototype.scanDelims = function (start, canSplitWord) {
+  var pos = start, lastChar, nextChar, count, can_open, can_close,
+      isLastWhiteSpace, isLastPunctChar,
+      isNextWhiteSpace, isNextPunctChar,
+      left_flanking = true,
+      right_flanking = true,
+      max = this.posMax,
+      marker = this.src.charCodeAt(start);
+
+  // treat beginning of the line as a whitespace
+  lastChar = start > 0 ? this.src.charCodeAt(start - 1) : 0x20;
+
+  while (pos < max && this.src.charCodeAt(pos) === marker) { pos++; }
+
+  count = pos - start;
+
+  // treat end of the line as a whitespace
+  nextChar = pos < max ? this.src.charCodeAt(pos) : 0x20;
+
+  isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
+  isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
+
+  isLastWhiteSpace = isWhiteSpace(lastChar);
+  isNextWhiteSpace = isWhiteSpace(nextChar);
+
+  if (isNextWhiteSpace) {
+    left_flanking = false;
+  } else if (isNextPunctChar) {
+    if (!(isLastWhiteSpace || isLastPunctChar)) {
+      left_flanking = false;
+    }
+  }
+
+  if (isLastWhiteSpace) {
+    right_flanking = false;
+  } else if (isLastPunctChar) {
+    if (!(isNextWhiteSpace || isNextPunctChar)) {
+      right_flanking = false;
+    }
+  }
+
+  if (!canSplitWord) {
+    can_open  = left_flanking  && (!right_flanking || isLastPunctChar);
+    can_close = right_flanking && (!left_flanking  || isNextPunctChar);
+  } else {
+    can_open  = left_flanking;
+    can_close = right_flanking;
+  }
+
+  return {
+    can_open:  can_open,
+    can_close: can_close,
+    length:    count
+  };
+};
+
+
+// re-export Token class to use in block rules
+StateInline.prototype.Token = Token;
+
+
+module.exports = StateInline;
+
+},{"../common/utils":32,"../token":79}],76:[function(require,module,exports){
+// ~~strike through~~
+//
+'use strict';
+
+
+// Insert each marker as a separate text token, and add it to delimiter list
+//
+module.exports.tokenize = function strikethrough(state, silent) {
+  var i, scanned, token, len, ch,
+      start = state.pos,
+      marker = state.src.charCodeAt(start);
+
+  if (silent) { return false; }
+
+  if (marker !== 0x7E/* ~ */) { return false; }
+
+  scanned = state.scanDelims(state.pos, true);
+  len = scanned.length;
+  ch = String.fromCharCode(marker);
+
+  if (len < 2) { return false; }
+
+  if (len % 2) {
+    token         = state.push('text', '', 0);
+    token.content = ch;
+    len--;
+  }
+
+  for (i = 0; i < len; i += 2) {
+    token         = state.push('text', '', 0);
+    token.content = ch + ch;
+
+    state.delimiters.push({
+      marker: marker,
+      jump:   i,
+      token:  state.tokens.length - 1,
+      level:  state.level,
+      end:    -1,
+      open:   scanned.can_open,
+      close:  scanned.can_close
+    });
+  }
+
+  state.pos += scanned.length;
+
+  return true;
+};
+
+
+// Walk through delimiter list and replace text tokens with tags
+//
+module.exports.postProcess = function strikethrough(state) {
+  var i, j,
+      startDelim,
+      endDelim,
+      token,
+      loneMarkers = [],
+      delimiters = state.delimiters,
+      max = state.delimiters.length;
+
+  for (i = 0; i < max; i++) {
+    startDelim = delimiters[i];
+
+    if (startDelim.marker !== 0x7E/* ~ */) {
+      continue;
+    }
+
+    if (startDelim.end === -1) {
+      continue;
+    }
+
+    endDelim = delimiters[startDelim.end];
+
+    token         = state.tokens[startDelim.token];
+    token.type    = 's_open';
+    token.tag     = 's';
+    token.nesting = 1;
+    token.markup  = '~~';
+    token.content = '';
+
+    token         = state.tokens[endDelim.token];
+    token.type    = 's_close';
+    token.tag     = 's';
+    token.nesting = -1;
+    token.markup  = '~~';
+    token.content = '';
+
+    if (state.tokens[endDelim.token - 1].type === 'text' &&
+        state.tokens[endDelim.token - 1].content === '~') {
+
+      loneMarkers.push(endDelim.token - 1);
+    }
+  }
+
+  // If a marker sequence has an odd number of characters, it's splitted
+  // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
+  // start of the sequence.
+  //
+  // So, we have to move all those markers after subsequent s_close tags.
+  //
+  while (loneMarkers.length) {
+    i = loneMarkers.pop();
+    j = i + 1;
+
+    while (j < state.tokens.length && state.tokens[j].type === 's_close') {
+      j++;
+    }
+
+    j--;
+
+    if (i !== j) {
+      token = state.tokens[j];
+      state.tokens[j] = state.tokens[i];
+      state.tokens[i] = token;
+    }
+  }
+};
+
+},{}],77:[function(require,module,exports){
+// Skip text characters for text token, place those to pending buffer
+// and increment current pos
+
+'use strict';
+
+
+// Rule to skip pure text
+// '{}$%@~+=:' reserved for extentions
+
+// !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
+
+// !!!! Don't confuse with "Markdown ASCII Punctuation" chars
+// http://spec.commonmark.org/0.15/#ascii-punctuation-character
+function isTerminatorChar(ch) {
+  switch (ch) {
+    case 0x0A/* \n */:
+    case 0x21/* ! */:
+    case 0x23/* # */:
+    case 0x24/* $ */:
+    case 0x25/* % */:
+    case 0x26/* & */:
+    case 0x2A/* * */:
+    case 0x2B/* + */:
+    case 0x2D/* - */:
+    case 0x3A/* : */:
+    case 0x3C/* < */:
+    case 0x3D/* = */:
+    case 0x3E/* > */:
+    case 0x40/* @ */:
+    case 0x5B/* [ */:
+    case 0x5C/* \ */:
+    case 0x5D/* ] */:
+    case 0x5E/* ^ */:
+    case 0x5F/* _ */:
+    case 0x60/* ` */:
+    case 0x7B/* { */:
+    case 0x7D/* } */:
+    case 0x7E/* ~ */:
+      return true;
+    default:
+      return false;
+  }
+}
+
+module.exports = function text(state, silent) {
+  var pos = state.pos;
+
+  while (pos < state.posMax && !isTerminatorChar(state.src.charCodeAt(pos))) {
+    pos++;
+  }
+
+  if (pos === state.pos) { return false; }
+
+  if (!silent) { state.pending += state.src.slice(state.pos, pos); }
+
+  state.pos = pos;
+
+  return true;
+};
+
+// Alternative implementation, for memory.
+//
+// It costs 10% of performance, but allows extend terminators list, if place it
+// to `ParcerInline` property. Probably, will switch to it sometime, such
+// flexibility required.
+
+/*
+var TERMINATOR_RE = /[\n!#$%&*+\-:<=>@[\\\]^_`{}~]/;
+
+module.exports = function text(state, silent) {
+  var pos = state.pos,
+      idx = state.src.slice(pos).search(TERMINATOR_RE);
+
+  // first char is terminator -> empty text
+  if (idx === 0) { return false; }
+
+  // no terminator -> text till end of string
+  if (idx < 0) {
+    if (!silent) { state.pending += state.src.slice(pos); }
+    state.pos = state.src.length;
+    return true;
+  }
+
+  if (!silent) { state.pending += state.src.slice(pos, pos + idx); }
+
+  state.pos += idx;
+
+  return true;
+};*/
+
+},{}],78:[function(require,module,exports){
+// Merge adjacent text nodes into one, and re-calculate all token levels
+//
+'use strict';
+
+
+module.exports = function text_collapse(state) {
+  var curr, last,
+      level = 0,
+      tokens = state.tokens,
+      max = state.tokens.length;
+
+  for (curr = last = 0; curr < max; curr++) {
+    // re-calculate levels
+    level += tokens[curr].nesting;
+    tokens[curr].level = level;
+
+    if (tokens[curr].type === 'text' &&
+        curr + 1 < max &&
+        tokens[curr + 1].type === 'text') {
+
+      // collapse two adjacent text nodes
+      tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content;
+    } else {
+      if (curr !== last) { tokens[last] = tokens[curr]; }
+
+      last++;
+    }
+  }
+
+  if (curr !== last) {
+    tokens.length = last;
+  }
+};
+
+},{}],79:[function(require,module,exports){
+// Token class
+
+'use strict';
+
+
+/**
+ * class Token
+ **/
+
+/**
+ * new Token(type, tag, nesting)
+ *
+ * Create new token and fill passed properties.
+ **/
+function Token(type, tag, nesting) {
+  /**
+   * Token#type -> String
+   *
+   * Type of the token (string, e.g. "paragraph_open")
+   **/
+  this.type     = type;
+
+  /**
+   * Token#tag -> String
+   *
+   * html tag name, e.g. "p"
+   **/
+  this.tag      = tag;
+
+  /**
+   * Token#attrs -> Array
+   *
+   * Html attributes. Format: `[ [ name1, value1 ], [ name2, value2 ] ]`
+   **/
+  this.attrs    = null;
+
+  /**
+   * Token#map -> Array
+   *
+   * Source map info. Format: `[ line_begin, line_end ]`
+   **/
+  this.map      = null;
+
+  /**
+   * Token#nesting -> Number
+   *
+   * Level change (number in {-1, 0, 1} set), where:
+   *
+   * -  `1` means the tag is opening
+   * -  `0` means the tag is self-closing
+   * - `-1` means the tag is closing
+   **/
+  this.nesting  = nesting;
+
+  /**
+   * Token#level -> Number
+   *
+   * nesting level, the same as `state.level`
+   **/
+  this.level    = 0;
+
+  /**
+   * Token#children -> Array
+   *
+   * An array of child nodes (inline and img tokens)
+   **/
+  this.children = null;
+
+  /**
+   * Token#content -> String
+   *
+   * In a case of self-closing tag (code, html, fence, etc.),
+   * it has contents of this tag.
+   **/
+  this.content  = '';
+
+  /**
+   * Token#markup -> String
+   *
+   * '*' or '_' for emphasis, fence string for fence, etc.
+   **/
+  this.markup   = '';
+
+  /**
+   * Token#info -> String
+   *
+   * fence infostring
+   **/
+  this.info     = '';
+
+  /**
+   * Token#meta -> Object
+   *
+   * A place for plugins to store an arbitrary data
+   **/
+  this.meta     = null;
+
+  /**
+   * Token#block -> Boolean
+   *
+   * True for block-level tokens, false for inline tokens.
+   * Used in renderer to calculate line breaks
+   **/
+  this.block    = false;
+
+  /**
+   * Token#hidden -> Boolean
+   *
+   * If it's true, ignore this element when rendering. Used for tight lists
+   * to hide paragraphs.
+   **/
+  this.hidden   = false;
+}
+
+
+/**
+ * Token.attrIndex(name) -> Number
+ *
+ * Search attribute index by name.
+ **/
+Token.prototype.attrIndex = function attrIndex(name) {
+  var attrs, i, len;
+
+  if (!this.attrs) { return -1; }
+
+  attrs = this.attrs;
+
+  for (i = 0, len = attrs.length; i < len; i++) {
+    if (attrs[i][0] === name) { return i; }
+  }
+  return -1;
+};
+
+
+/**
+ * Token.attrPush(attrData)
+ *
+ * Add `[ name, value ]` attribute to list. Init attrs if necessary
+ **/
+Token.prototype.attrPush = function attrPush(attrData) {
+  if (this.attrs) {
+    this.attrs.push(attrData);
+  } else {
+    this.attrs = [ attrData ];
+  }
+};
+
+
+/**
+ * Token.attrSet(name, value)
+ *
+ * Set `name` attribute to `value`. Override old value if exists.
+ **/
+Token.prototype.attrSet = function attrSet(name, value) {
+  var idx = this.attrIndex(name),
+      attrData = [ name, value ];
+
+  if (idx < 0) {
+    this.attrPush(attrData);
+  } else {
+    this.attrs[idx] = attrData;
+  }
+};
+
+
+/**
+ * Token.attrJoin(name, value)
+ *
+ * Join value to existing attribute via space. Or create new attribute if not
+ * exists. Useful to operate with token classes.
+ **/
+Token.prototype.attrJoin = function attrJoin(name, value) {
+  var idx = this.attrIndex(name);
+
+  if (idx < 0) {
+    this.attrPush([ name, value ]);
+  } else {
+    this.attrs[idx][1] = this.attrs[idx][1] + ' ' + value;
+  }
+};
+
+
+module.exports = Token;
+
+},{}],80:[function(require,module,exports){
+/** @flow */
+
+"use strict";
+
+function getRelocatable(re) {
+  // In the future, this could use a WeakMap instead of an expando.
+  if (!re.__matchAtRelocatable) {
+    // Disjunctions are the lowest-precedence operator, so we can make any
+    // pattern match the empty string by appending `|()` to it:
+    // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-patterns
+    var source = re.source + "|()";
+
+    // We always make the new regex global.
+    var flags = "g" + (re.ignoreCase ? "i" : "") + (re.multiline ? "m" : "") + (re.unicode ? "u" : "")
+    // sticky (/.../y) doesn't make sense in conjunction with our relocation
+    // logic, so we ignore it here.
+    ;
+
+    re.__matchAtRelocatable = new RegExp(source, flags);
+  }
+  return re.__matchAtRelocatable;
+}
+
+function matchAt(re, str, pos) {
+  if (re.global || re.sticky) {
+    throw new Error("matchAt(...): Only non-global regexes are supported");
+  }
+  var reloc = getRelocatable(re);
+  reloc.lastIndex = pos;
+  var match = reloc.exec(str);
+  // Last capturing group is our sentinel that indicates whether the regex
+  // matched at the given location.
+  if (match[match.length - 1] == null) {
+    // Original regex matched.
+    match.length = match.length - 1;
+    return match;
+  } else {
+    return null;
+  }
+}
+
+module.exports = matchAt;
+},{}],81:[function(require,module,exports){
+
+'use strict';
+
+
+/* eslint-disable no-bitwise */
+
+var decodeCache = {};
+
+function getDecodeCache(exclude) {
+  var i, ch, cache = decodeCache[exclude];
+  if (cache) { return cache; }
+
+  cache = decodeCache[exclude] = [];
+
+  for (i = 0; i < 128; i++) {
+    ch = String.fromCharCode(i);
+    cache.push(ch);
+  }
+
+  for (i = 0; i < exclude.length; i++) {
+    ch = exclude.charCodeAt(i);
+    cache[ch] = '%' + ('0' + ch.toString(16).toUpperCase()).slice(-2);
+  }
+
+  return cache;
+}
+
+
+// Decode percent-encoded string.
+//
+function decode(string, exclude) {
+  var cache;
+
+  if (typeof exclude !== 'string') {
+    exclude = decode.defaultChars;
+  }
+
+  cache = getDecodeCache(exclude);
+
+  return string.replace(/(%[a-f0-9]{2})+/gi, function(seq) {
+    var i, l, b1, b2, b3, b4, chr,
+        result = '';
+
+    for (i = 0, l = seq.length; i < l; i += 3) {
+      b1 = parseInt(seq.slice(i + 1, i + 3), 16);
+
+      if (b1 < 0x80) {
+        result += cache[b1];
+        continue;
+      }
+
+      if ((b1 & 0xE0) === 0xC0 && (i + 3 < l)) {
+        // 110xxxxx 10xxxxxx
+        b2 = parseInt(seq.slice(i + 4, i + 6), 16);
+
+        if ((b2 & 0xC0) === 0x80) {
+          chr = ((b1 << 6) & 0x7C0) | (b2 & 0x3F);
+
+          if (chr < 0x80) {
+            result += '\ufffd\ufffd';
+          } else {
+            result += String.fromCharCode(chr);
+          }
+
+          i += 3;
+          continue;
+        }
+      }
+
+      if ((b1 & 0xF0) === 0xE0 && (i + 6 < l)) {
+        // 1110xxxx 10xxxxxx 10xxxxxx
+        b2 = parseInt(seq.slice(i + 4, i + 6), 16);
+        b3 = parseInt(seq.slice(i + 7, i + 9), 16);
+
+        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+          chr = ((b1 << 12) & 0xF000) | ((b2 << 6) & 0xFC0) | (b3 & 0x3F);
+
+          if (chr < 0x800 || (chr >= 0xD800 && chr <= 0xDFFF)) {
+            result += '\ufffd\ufffd\ufffd';
+          } else {
+            result += String.fromCharCode(chr);
+          }
+
+          i += 6;
+          continue;
+        }
+      }
+
+      if ((b1 & 0xF8) === 0xF0 && (i + 9 < l)) {
+        // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx
+        b2 = parseInt(seq.slice(i + 4, i + 6), 16);
+        b3 = parseInt(seq.slice(i + 7, i + 9), 16);
+        b4 = parseInt(seq.slice(i + 10, i + 12), 16);
+
+        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80 && (b4 & 0xC0) === 0x80) {
+          chr = ((b1 << 18) & 0x1C0000) | ((b2 << 12) & 0x3F000) | ((b3 << 6) & 0xFC0) | (b4 & 0x3F);
+
+          if (chr < 0x10000 || chr > 0x10FFFF) {
+            result += '\ufffd\ufffd\ufffd\ufffd';
+          } else {
+            chr -= 0x10000;
+            result += String.fromCharCode(0xD800 + (chr >> 10), 0xDC00 + (chr & 0x3FF));
+          }
+
+          i += 9;
+          continue;
+        }
+      }
+
+      result += '\ufffd';
+    }
+
+    return result;
+  });
+}
+
+
+decode.defaultChars   = ';/?:@&=+$,#';
+decode.componentChars = '';
+
+
+module.exports = decode;
+
+},{}],82:[function(require,module,exports){
+
+'use strict';
+
+
+var encodeCache = {};
+
+
+// Create a lookup array where anything but characters in `chars` string
+// and alphanumeric chars is percent-encoded.
+//
+function getEncodeCache(exclude) {
+  var i, ch, cache = encodeCache[exclude];
+  if (cache) { return cache; }
+
+  cache = encodeCache[exclude] = [];
+
+  for (i = 0; i < 128; i++) {
+    ch = String.fromCharCode(i);
+
+    if (/^[0-9a-z]$/i.test(ch)) {
+      // always allow unencoded alphanumeric characters
+      cache.push(ch);
+    } else {
+      cache.push('%' + ('0' + i.toString(16).toUpperCase()).slice(-2));
+    }
+  }
+
+  for (i = 0; i < exclude.length; i++) {
+    cache[exclude.charCodeAt(i)] = exclude[i];
+  }
+
+  return cache;
+}
+
+
+// Encode unsafe characters with percent-encoding, skipping already
+// encoded sequences.
+//
+//  - string       - string to encode
+//  - exclude      - list of characters to ignore (in addition to a-zA-Z0-9)
+//  - keepEscaped  - don't encode '%' in a correct escape sequence (default: true)
+//
+function encode(string, exclude, keepEscaped) {
+  var i, l, code, nextCode, cache,
+      result = '';
+
+  if (typeof exclude !== 'string') {
+    // encode(string, keepEscaped)
+    keepEscaped  = exclude;
+    exclude = encode.defaultChars;
+  }
+
+  if (typeof keepEscaped === 'undefined') {
+    keepEscaped = true;
+  }
+
+  cache = getEncodeCache(exclude);
+
+  for (i = 0, l = string.length; i < l; i++) {
+    code = string.charCodeAt(i);
+
+    if (keepEscaped && code === 0x25 /* % */ && i + 2 < l) {
+      if (/^[0-9a-f]{2}$/i.test(string.slice(i + 1, i + 3))) {
+        result += string.slice(i, i + 3);
+        i += 2;
+        continue;
+      }
+    }
+
+    if (code < 128) {
+      result += cache[code];
+      continue;
+    }
+
+    if (code >= 0xD800 && code <= 0xDFFF) {
+      if (code >= 0xD800 && code <= 0xDBFF && i + 1 < l) {
+        nextCode = string.charCodeAt(i + 1);
+        if (nextCode >= 0xDC00 && nextCode <= 0xDFFF) {
+          result += encodeURIComponent(string[i] + string[i + 1]);
+          i++;
+          continue;
+        }
+      }
+      result += '%EF%BF%BD';
+      continue;
+    }
+
+    result += encodeURIComponent(string[i]);
+  }
+
+  return result;
+}
+
+encode.defaultChars   = ";/?:@&=+$,-_.!~*'()#";
+encode.componentChars = "-_.!~*'()";
+
+
+module.exports = encode;
+
+},{}],83:[function(require,module,exports){
+
+'use strict';
+
+
+module.exports = function format(url) {
+  var result = '';
+
+  result += url.protocol || '';
+  result += url.slashes ? '//' : '';
+  result += url.auth ? url.auth + '@' : '';
+
+  if (url.hostname && url.hostname.indexOf(':') !== -1) {
+    // ipv6 address
+    result += '[' + url.hostname + ']';
+  } else {
+    result += url.hostname || '';
+  }
+
+  result += url.port ? ':' + url.port : '';
+  result += url.pathname || '';
+  result += url.search || '';
+  result += url.hash || '';
+
+  return result;
+};
+
+},{}],84:[function(require,module,exports){
+'use strict';
+
+
+module.exports.encode = require('./encode');
+module.exports.decode = require('./decode');
+module.exports.format = require('./format');
+module.exports.parse  = require('./parse');
+
+},{"./decode":81,"./encode":82,"./format":83,"./parse":85}],85:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+//
+// Changes from joyent/node:
+//
+// 1. No leading slash in paths,
+//    e.g. in `url.parse('http://foo?bar')` pathname is ``, not `/`
+//
+// 2. Backslashes are not replaced with slashes,
+//    so `http:\\example.org\` is treated like a relative path
+//
+// 3. Trailing colon is treated like a part of the path,
+//    i.e. in `http://example.org:foo` pathname is `:foo`
+//
+// 4. Nothing is URL-encoded in the resulting object,
+//    (in joyent/node some chars in auth and paths are encoded)
+//
+// 5. `url.parse()` does not have `parseQueryString` argument
+//
+// 6. Removed extraneous result properties: `host`, `path`, `query`, etc.,
+//    which can be constructed using other parts of the url.
+//
+
+
+function Url() {
+  this.protocol = null;
+  this.slashes = null;
+  this.auth = null;
+  this.port = null;
+  this.hostname = null;
+  this.hash = null;
+  this.search = null;
+  this.pathname = null;
+}
+
+// Reference: RFC 3986, RFC 1808, RFC 2396
+
+// define these here so at least they only have to be
+// compiled once on the first module load.
+var protocolPattern = /^([a-z0-9.+-]+:)/i,
+    portPattern = /:[0-9]*$/,
+
+    // Special case for a simple path URL
+    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
+
+    // RFC 2396: characters reserved for delimiting URLs.
+    // We actually just auto-escape these.
+    delims = [ '<', '>', '"', '`', ' ', '\r', '\n', '\t' ],
+
+    // RFC 2396: characters not allowed for various reasons.
+    unwise = [ '{', '}', '|', '\\', '^', '`' ].concat(delims),
+
+    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
+    autoEscape = [ '\'' ].concat(unwise),
+    // Characters that are never ever allowed in a hostname.
+    // Note that any invalid chars are also handled, but these
+    // are the ones that are *expected* to be seen, so we fast-path
+    // them.
+    nonHostChars = [ '%', '/', '?', ';', '#' ].concat(autoEscape),
+    hostEndingChars = [ '/', '?', '#' ],
+    hostnameMaxLen = 255,
+    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
+    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
+    // protocols that can allow "unsafe" and "unwise" chars.
+    /* eslint-disable no-script-url */
+    // protocols that never have a hostname.
+    hostlessProtocol = {
+      'javascript': true,
+      'javascript:': true
+    },
+    // protocols that always contain a // bit.
+    slashedProtocol = {
+      'http': true,
+      'https': true,
+      'ftp': true,
+      'gopher': true,
+      'file': true,
+      'http:': true,
+      'https:': true,
+      'ftp:': true,
+      'gopher:': true,
+      'file:': true
+    };
+    /* eslint-enable no-script-url */
+
+function urlParse(url, slashesDenoteHost) {
+  if (url && url instanceof Url) { return url; }
+
+  var u = new Url();
+  u.parse(url, slashesDenoteHost);
+  return u;
+}
+
+Url.prototype.parse = function(url, slashesDenoteHost) {
+  var i, l, lowerProto, hec, slashes,
+      rest = url;
+
+  // trim before proceeding.
+  // This is to support parse stuff like "  http://foo.com  \n"
+  rest = rest.trim();
+
+  if (!slashesDenoteHost && url.split('#').length === 1) {
+    // Try fast path regexp
+    var simplePath = simplePathPattern.exec(rest);
+    if (simplePath) {
+      this.pathname = simplePath[1];
+      if (simplePath[2]) {
+        this.search = simplePath[2];
+      }
+      return this;
+    }
+  }
+
+  var proto = protocolPattern.exec(rest);
+  if (proto) {
+    proto = proto[0];
+    lowerProto = proto.toLowerCase();
+    this.protocol = proto;
+    rest = rest.substr(proto.length);
+  }
+
+  // figure out if it's got a host
+  // user@server is *always* interpreted as a hostname, and url
+  // resolution will treat //foo/bar as host=foo,path=bar because that's
+  // how the browser resolves relative URLs.
+  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
+    slashes = rest.substr(0, 2) === '//';
+    if (slashes && !(proto && hostlessProtocol[proto])) {
+      rest = rest.substr(2);
+      this.slashes = true;
+    }
+  }
+
+  if (!hostlessProtocol[proto] &&
+      (slashes || (proto && !slashedProtocol[proto]))) {
+
+    // there's a hostname.
+    // the first instance of /, ?, ;, or # ends the host.
+    //
+    // If there is an @ in the hostname, then non-host chars *are* allowed
+    // to the left of the last @ sign, unless some host-ending character
+    // comes *before* the @-sign.
+    // URLs are obnoxious.
+    //
+    // ex:
+    // http://a@b@c/ => user:a@b host:c
+    // http://a@b?@c => user:a host:c path:/?@c
+
+    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
+    // Review our test case against browsers more comprehensively.
+
+    // find the first instance of any hostEndingChars
+    var hostEnd = -1;
+    for (i = 0; i < hostEndingChars.length; i++) {
+      hec = rest.indexOf(hostEndingChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
+        hostEnd = hec;
+      }
+    }
+
+    // at this point, either we have an explicit point where the
+    // auth portion cannot go past, or the last @ char is the decider.
+    var auth, atSign;
+    if (hostEnd === -1) {
+      // atSign can be anywhere.
+      atSign = rest.lastIndexOf('@');
+    } else {
+      // atSign must be in auth portion.
+      // http://a@b/c@d => host:b auth:a path:/c@d
+      atSign = rest.lastIndexOf('@', hostEnd);
+    }
+
+    // Now we have a portion which is definitely the auth.
+    // Pull that off.
+    if (atSign !== -1) {
+      auth = rest.slice(0, atSign);
+      rest = rest.slice(atSign + 1);
+      this.auth = auth;
+    }
+
+    // the host is the remaining to the left of the first non-host char
+    hostEnd = -1;
+    for (i = 0; i < nonHostChars.length; i++) {
+      hec = rest.indexOf(nonHostChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
+        hostEnd = hec;
+      }
+    }
+    // if we still have not hit it, then the entire thing is a host.
+    if (hostEnd === -1) {
+      hostEnd = rest.length;
+    }
+
+    if (rest[hostEnd - 1] === ':') { hostEnd--; }
+    var host = rest.slice(0, hostEnd);
+    rest = rest.slice(hostEnd);
+
+    // pull out port.
+    this.parseHost(host);
+
+    // we've indicated that there is a hostname,
+    // so even if it's empty, it has to be present.
+    this.hostname = this.hostname || '';
+
+    // if hostname begins with [ and ends with ]
+    // assume that it's an IPv6 address.
+    var ipv6Hostname = this.hostname[0] === '[' &&
+        this.hostname[this.hostname.length - 1] === ']';
+
+    // validate a little.
+    if (!ipv6Hostname) {
+      var hostparts = this.hostname.split(/\./);
+      for (i = 0, l = hostparts.length; i < l; i++) {
+        var part = hostparts[i];
+        if (!part) { continue; }
+        if (!part.match(hostnamePartPattern)) {
+          var newpart = '';
+          for (var j = 0, k = part.length; j < k; j++) {
+            if (part.charCodeAt(j) > 127) {
+              // we replace non-ASCII char with a temporary placeholder
+              // we need this to make sure size of hostname is not
+              // broken by replacing non-ASCII by nothing
+              newpart += 'x';
+            } else {
+              newpart += part[j];
+            }
+          }
+          // we test again with ASCII char only
+          if (!newpart.match(hostnamePartPattern)) {
+            var validParts = hostparts.slice(0, i);
+            var notHost = hostparts.slice(i + 1);
+            var bit = part.match(hostnamePartStart);
+            if (bit) {
+              validParts.push(bit[1]);
+              notHost.unshift(bit[2]);
+            }
+            if (notHost.length) {
+              rest = notHost.join('.') + rest;
+            }
+            this.hostname = validParts.join('.');
+            break;
+          }
+        }
+      }
+    }
+
+    if (this.hostname.length > hostnameMaxLen) {
+      this.hostname = '';
+    }
+
+    // strip [ and ] from the hostname
+    // the host field still retains them, though
+    if (ipv6Hostname) {
+      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
+    }
+  }
+
+  // chop off from the tail first.
+  var hash = rest.indexOf('#');
+  if (hash !== -1) {
+    // got a fragment string.
+    this.hash = rest.substr(hash);
+    rest = rest.slice(0, hash);
+  }
+  var qm = rest.indexOf('?');
+  if (qm !== -1) {
+    this.search = rest.substr(qm);
+    rest = rest.slice(0, qm);
+  }
+  if (rest) { this.pathname = rest; }
+  if (slashedProtocol[lowerProto] &&
+      this.hostname && !this.pathname) {
+    this.pathname = '';
+  }
+
+  return this;
+};
+
+Url.prototype.parseHost = function(host) {
+  var port = portPattern.exec(host);
+  if (port) {
+    port = port[0];
+    if (port !== ':') {
+      this.port = port.substr(1);
+    }
+    host = host.substr(0, host.length - port.length);
+  }
+  if (host) { this.hostname = host; }
+};
+
+module.exports = urlParse;
+
+},{}],86:[function(require,module,exports){
+module.exports=/[\0-\x1F\x7F-\x9F]/
+},{}],87:[function(require,module,exports){
+module.exports=/[\xAD\u0600-\u0605\u061C\u06DD\u070F\u180E\u200B-\u200F\u202A-\u202E\u2060-\u2064\u2066-\u206F\uFEFF\uFFF9-\uFFFB]|\uD804\uDCBD|\uD82F[\uDCA0-\uDCA3]|\uD834[\uDD73-\uDD7A]|\uDB40[\uDC01\uDC20-\uDC7F]/
+},{}],88:[function(require,module,exports){
+module.exports=/[!-#%-\*,-/:;\?@\[-\]_\{\}\xA1\xA7\xAB\xB6\xB7\xBB\xBF\u037E\u0387\u055A-\u055F\u0589\u058A\u05BE\u05C0\u05C3\u05C6\u05F3\u05F4\u0609\u060A\u060C\u060D\u061B\u061E\u061F\u066A-\u066D\u06D4\u0700-\u070D\u07F7-\u07F9\u0830-\u083E\u085E\u0964\u0965\u0970\u0AF0\u0DF4\u0E4F\u0E5A\u0E5B\u0F04-\u0F12\u0F14\u0F3A-\u0F3D\u0F85\u0FD0-\u0FD4\u0FD9\u0FDA\u104A-\u104F\u10FB\u1360-\u1368\u1400\u166D\u166E\u169B\u169C\u16EB-\u16ED\u1735\u1736\u17D4-\u17D6\u17D8-\u17DA\u1800-\u180A\u1944\u1945\u1A1E\u1A1F\u1AA0-\u1AA6\u1AA8-\u1AAD\u1B5A-\u1B60\u1BFC-\u1BFF\u1C3B-\u1C3F\u1C7E\u1C7F\u1CC0-\u1CC7\u1CD3\u2010-\u2027\u2030-\u2043\u2045-\u2051\u2053-\u205E\u207D\u207E\u208D\u208E\u2308-\u230B\u2329\u232A\u2768-\u2775\u27C5\u27C6\u27E6-\u27EF\u2983-\u2998\u29D8-\u29DB\u29FC\u29FD\u2CF9-\u2CFC\u2CFE\u2CFF\u2D70\u2E00-\u2E2E\u2E30-\u2E42\u3001-\u3003\u3008-\u3011\u3014-\u301F\u3030\u303D\u30A0\u30FB\uA4FE\uA4FF\uA60D-\uA60F\uA673\uA67E\uA6F2-\uA6F7\uA874-\uA877\uA8CE\uA8CF\uA8F8-\uA8FA\uA92E\uA92F\uA95F\uA9C1-\uA9CD\uA9DE\uA9DF\uAA5C-\uAA5F\uAADE\uAADF\uAAF0\uAAF1\uABEB\uFD3E\uFD3F\uFE10-\uFE19\uFE30-\uFE52\uFE54-\uFE61\uFE63\uFE68\uFE6A\uFE6B\uFF01-\uFF03\uFF05-\uFF0A\uFF0C-\uFF0F\uFF1A\uFF1B\uFF1F\uFF20\uFF3B-\uFF3D\uFF3F\uFF5B\uFF5D\uFF5F-\uFF65]|\uD800[\uDD00-\uDD02\uDF9F\uDFD0]|\uD801\uDD6F|\uD802[\uDC57\uDD1F\uDD3F\uDE50-\uDE58\uDE7F\uDEF0-\uDEF6\uDF39-\uDF3F\uDF99-\uDF9C]|\uD804[\uDC47-\uDC4D\uDCBB\uDCBC\uDCBE-\uDCC1\uDD40-\uDD43\uDD74\uDD75\uDDC5-\uDDC8\uDDCD\uDE38-\uDE3D]|\uD805[\uDCC6\uDDC1-\uDDC9\uDE41-\uDE43]|\uD809[\uDC70-\uDC74]|\uD81A[\uDE6E\uDE6F\uDEF5\uDF37-\uDF3B\uDF44]|\uD82F\uDC9F/
+},{}],89:[function(require,module,exports){
+module.exports=/[ \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]/
+},{}],90:[function(require,module,exports){
+
+module.exports.Any = require('./properties/Any/regex');
+module.exports.Cc  = require('./categories/Cc/regex');
+module.exports.Cf  = require('./categories/Cf/regex');
+module.exports.P   = require('./categories/P/regex');
+module.exports.Z   = require('./categories/Z/regex');
+
+},{"./categories/Cc/regex":86,"./categories/Cf/regex":87,"./categories/P/regex":88,"./categories/Z/regex":89,"./properties/Any/regex":91}],91:[function(require,module,exports){
+module.exports=/[\0-\uD7FF\uDC00-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF]/
+},{}],92:[function(require,module,exports){
+(function (global){
+/*! https://mths.be/punycode v1.4.0 by @mathias */
+;(function(root) {
+
+	/** Detect free variables */
+	var freeExports = typeof exports == 'object' && exports &&
+		!exports.nodeType && exports;
+	var freeModule = typeof module == 'object' && module &&
+		!module.nodeType && module;
+	var freeGlobal = typeof global == 'object' && global;
+	if (
+		freeGlobal.global === freeGlobal ||
+		freeGlobal.window === freeGlobal ||
+		freeGlobal.self === freeGlobal
+	) {
+		root = freeGlobal;
+	}
+
+	/**
+	 * The `punycode` object.
+	 * @name punycode
+	 * @type Object
+	 */
+	var punycode,
+
+	/** Highest positive signed 32-bit float value */
+	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
+
+	/** Bootstring parameters */
+	base = 36,
+	tMin = 1,
+	tMax = 26,
+	skew = 38,
+	damp = 700,
+	initialBias = 72,
+	initialN = 128, // 0x80
+	delimiter = '-', // '\x2D'
+
+	/** Regular expressions */
+	regexPunycode = /^xn--/,
+	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
+	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
+
+	/** Error messages */
+	errors = {
+		'overflow': 'Overflow: input needs wider integers to process',
+		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
+		'invalid-input': 'Invalid input'
+	},
+
+	/** Convenience shortcuts */
+	baseMinusTMin = base - tMin,
+	floor = Math.floor,
+	stringFromCharCode = String.fromCharCode,
+
+	/** Temporary variable */
+	key;
+
+	/*--------------------------------------------------------------------------*/
+
+	/**
+	 * A generic error utility function.
+	 * @private
+	 * @param {String} type The error type.
+	 * @returns {Error} Throws a `RangeError` with the applicable error message.
+	 */
+	function error(type) {
+		throw new RangeError(errors[type]);
+	}
+
+	/**
+	 * A generic `Array#map` utility function.
+	 * @private
+	 * @param {Array} array The array to iterate over.
+	 * @param {Function} callback The function that gets called for every array
+	 * item.
+	 * @returns {Array} A new array of values returned by the callback function.
+	 */
+	function map(array, fn) {
+		var length = array.length;
+		var result = [];
+		while (length--) {
+			result[length] = fn(array[length]);
+		}
+		return result;
+	}
+
+	/**
+	 * A simple `Array#map`-like wrapper to work with domain name strings or email
+	 * addresses.
+	 * @private
+	 * @param {String} domain The domain name or email address.
+	 * @param {Function} callback The function that gets called for every
+	 * character.
+	 * @returns {Array} A new string of characters returned by the callback
+	 * function.
+	 */
+	function mapDomain(string, fn) {
+		var parts = string.split('@');
+		var result = '';
+		if (parts.length > 1) {
+			// In email addresses, only the domain name should be punycoded. Leave
+			// the local part (i.e. everything up to `@`) intact.
+			result = parts[0] + '@';
+			string = parts[1];
+		}
+		// Avoid `split(regex)` for IE8 compatibility. See #17.
+		string = string.replace(regexSeparators, '\x2E');
+		var labels = string.split('.');
+		var encoded = map(labels, fn).join('.');
+		return result + encoded;
+	}
+
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 * @see `punycode.ucs2.encode`
+	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+	 * @memberOf punycode.ucs2
+	 * @name decode
+	 * @param {String} string The Unicode input string (UCS-2).
+	 * @returns {Array} The new array of code points.
+	 */
+	function ucs2decode(string) {
+		var output = [],
+		    counter = 0,
+		    length = string.length,
+		    value,
+		    extra;
+		while (counter < length) {
+			value = string.charCodeAt(counter++);
+			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+				// high surrogate, and there is a next character
+				extra = string.charCodeAt(counter++);
+				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
+					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+				} else {
+					// unmatched surrogate; only append this code unit, in case the next
+					// code unit is the high surrogate of a surrogate pair
+					output.push(value);
+					counter--;
+				}
+			} else {
+				output.push(value);
+			}
+		}
+		return output;
+	}
+
+	/**
+	 * Creates a string based on an array of numeric code points.
+	 * @see `punycode.ucs2.decode`
+	 * @memberOf punycode.ucs2
+	 * @name encode
+	 * @param {Array} codePoints The array of numeric code points.
+	 * @returns {String} The new Unicode string (UCS-2).
+	 */
+	function ucs2encode(array) {
+		return map(array, function(value) {
+			var output = '';
+			if (value > 0xFFFF) {
+				value -= 0x10000;
+				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
+				value = 0xDC00 | value & 0x3FF;
+			}
+			output += stringFromCharCode(value);
+			return output;
+		}).join('');
+	}
+
+	/**
+	 * Converts a basic code point into a digit/integer.
+	 * @see `digitToBasic()`
+	 * @private
+	 * @param {Number} codePoint The basic numeric code point value.
+	 * @returns {Number} The numeric value of a basic code point (for use in
+	 * representing integers) in the range `0` to `base - 1`, or `base` if
+	 * the code point does not represent a value.
+	 */
+	function basicToDigit(codePoint) {
+		if (codePoint - 48 < 10) {
+			return codePoint - 22;
+		}
+		if (codePoint - 65 < 26) {
+			return codePoint - 65;
+		}
+		if (codePoint - 97 < 26) {
+			return codePoint - 97;
+		}
+		return base;
+	}
+
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 * @see `basicToDigit()`
+	 * @private
+	 * @param {Number} digit The numeric value of a basic code point.
+	 * @returns {Number} The basic code point whose value (when used for
+	 * representing integers) is `digit`, which needs to be in the range
+	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
+	 * used; else, the lowercase form is used. The behavior is undefined
+	 * if `flag` is non-zero and `digit` has no uppercase form.
+	 */
+	function digitToBasic(digit, flag) {
+		//  0..25 map to ASCII a..z or A..Z
+		// 26..35 map to ASCII 0..9
+		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
+	}
+
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * https://tools.ietf.org/html/rfc3492#section-3.4
+	 * @private
+	 */
+	function adapt(delta, numPoints, firstTime) {
+		var k = 0;
+		delta = firstTime ? floor(delta / damp) : delta >> 1;
+		delta += floor(delta / numPoints);
+		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
+			delta = floor(delta / baseMinusTMin);
+		}
+		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	}
+
+	/**
+	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
+	 * symbols.
+	 * @memberOf punycode
+	 * @param {String} input The Punycode string of ASCII-only symbols.
+	 * @returns {String} The resulting string of Unicode symbols.
+	 */
+	function decode(input) {
+		// Don't use UCS-2
+		var output = [],
+		    inputLength = input.length,
+		    out,
+		    i = 0,
+		    n = initialN,
+		    bias = initialBias,
+		    basic,
+		    j,
+		    index,
+		    oldi,
+		    w,
+		    k,
+		    digit,
+		    t,
+		    /** Cached calculation results */
+		    baseMinusT;
+
+		// Handle the basic code points: let `basic` be the number of input code
+		// points before the last delimiter, or `0` if there is none, then copy
+		// the first basic code points to the output.
+
+		basic = input.lastIndexOf(delimiter);
+		if (basic < 0) {
+			basic = 0;
+		}
+
+		for (j = 0; j < basic; ++j) {
+			// if it's not a basic code point
+			if (input.charCodeAt(j) >= 0x80) {
+				error('not-basic');
+			}
+			output.push(input.charCodeAt(j));
+		}
+
+		// Main decoding loop: start just after the last delimiter if any basic code
+		// points were copied; start at the beginning otherwise.
+
+		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
+
+			// `index` is the index of the next character to be consumed.
+			// Decode a generalized variable-length integer into `delta`,
+			// which gets added to `i`. The overflow checking is easier
+			// if we increase `i` as we go, then subtract off its starting
+			// value at the end to obtain `delta`.
+			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
+
+				if (index >= inputLength) {
+					error('invalid-input');
+				}
+
+				digit = basicToDigit(input.charCodeAt(index++));
+
+				if (digit >= base || digit > floor((maxInt - i) / w)) {
+					error('overflow');
+				}
+
+				i += digit * w;
+				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+
+				if (digit < t) {
+					break;
+				}
+
+				baseMinusT = base - t;
+				if (w > floor(maxInt / baseMinusT)) {
+					error('overflow');
+				}
+
+				w *= baseMinusT;
+
+			}
+
+			out = output.length + 1;
+			bias = adapt(i - oldi, out, oldi == 0);
+
+			// `i` was supposed to wrap around from `out` to `0`,
+			// incrementing `n` each time, so we'll fix that now:
+			if (floor(i / out) > maxInt - n) {
+				error('overflow');
+			}
+
+			n += floor(i / out);
+			i %= out;
+
+			// Insert `n` at position `i` of the output
+			output.splice(i++, 0, n);
+
+		}
+
+		return ucs2encode(output);
+	}
+
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 * @memberOf punycode
+	 * @param {String} input The string of Unicode symbols.
+	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
+	 */
+	function encode(input) {
+		var n,
+		    delta,
+		    handledCPCount,
+		    basicLength,
+		    bias,
+		    j,
+		    m,
+		    q,
+		    k,
+		    t,
+		    currentValue,
+		    output = [],
+		    /** `inputLength` will hold the number of code points in `input`. */
+		    inputLength,
+		    /** Cached calculation results */
+		    handledCPCountPlusOne,
+		    baseMinusT,
+		    qMinusT;
+
+		// Convert the input in UCS-2 to Unicode
+		input = ucs2decode(input);
+
+		// Cache the length
+		inputLength = input.length;
+
+		// Initialize the state
+		n = initialN;
+		delta = 0;
+		bias = initialBias;
+
+		// Handle the basic code points
+		for (j = 0; j < inputLength; ++j) {
+			currentValue = input[j];
+			if (currentValue < 0x80) {
+				output.push(stringFromCharCode(currentValue));
+			}
+		}
+
+		handledCPCount = basicLength = output.length;
+
+		// `handledCPCount` is the number of code points that have been handled;
+		// `basicLength` is the number of basic code points.
+
+		// Finish the basic string - if it is not empty - with a delimiter
+		if (basicLength) {
+			output.push(delimiter);
+		}
+
+		// Main encoding loop:
+		while (handledCPCount < inputLength) {
+
+			// All non-basic code points < n have been handled already. Find the next
+			// larger one:
+			for (m = maxInt, j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+				if (currentValue >= n && currentValue < m) {
+					m = currentValue;
+				}
+			}
+
+			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
+			// but guard against overflow
+			handledCPCountPlusOne = handledCPCount + 1;
+			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
+				error('overflow');
+			}
+
+			delta += (m - n) * handledCPCountPlusOne;
+			n = m;
+
+			for (j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+
+				if (currentValue < n && ++delta > maxInt) {
+					error('overflow');
+				}
+
+				if (currentValue == n) {
+					// Represent delta as a generalized variable-length integer
+					for (q = delta, k = base; /* no condition */; k += base) {
+						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+						if (q < t) {
+							break;
+						}
+						qMinusT = q - t;
+						baseMinusT = base - t;
+						output.push(
+							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
+						);
+						q = floor(qMinusT / baseMinusT);
+					}
+
+					output.push(stringFromCharCode(digitToBasic(q, 0)));
+					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+					delta = 0;
+					++handledCPCount;
+				}
+			}
+
+			++delta;
+			++n;
+
+		}
+		return output.join('');
+	}
+
+	/**
+	 * Converts a Punycode string representing a domain name or an email address
+	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
+	 * it doesn't matter if you call it on a string that has already been
+	 * converted to Unicode.
+	 * @memberOf punycode
+	 * @param {String} input The Punycoded domain name or email address to
+	 * convert to Unicode.
+	 * @returns {String} The Unicode representation of the given Punycode
+	 * string.
+	 */
+	function toUnicode(input) {
+		return mapDomain(input, function(string) {
+			return regexPunycode.test(string)
+				? decode(string.slice(4).toLowerCase())
+				: string;
+		});
+	}
+
+	/**
+	 * Converts a Unicode string representing a domain name or an email address to
+	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
+	 * i.e. it doesn't matter if you call it with a domain that's already in
+	 * ASCII.
+	 * @memberOf punycode
+	 * @param {String} input The domain name or email address to convert, as a
+	 * Unicode string.
+	 * @returns {String} The Punycode representation of the given domain name or
+	 * email address.
+	 */
+	function toASCII(input) {
+		return mapDomain(input, function(string) {
+			return regexNonASCII.test(string)
+				? 'xn--' + encode(string)
+				: string;
+		});
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	/** Define the public API */
+	punycode = {
+		/**
+		 * A string representing the current Punycode.js version number.
+		 * @memberOf punycode
+		 * @type String
+		 */
+		'version': '1.3.2',
+		/**
+		 * An object of methods to convert from JavaScript's internal character
+		 * representation (UCS-2) to Unicode code points, and back.
+		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+		 * @memberOf punycode
+		 * @type Object
+		 */
+		'ucs2': {
+			'decode': ucs2decode,
+			'encode': ucs2encode
+		},
+		'decode': decode,
+		'encode': encode,
+		'toASCII': toASCII,
+		'toUnicode': toUnicode
+	};
+
+	/** Expose `punycode` */
+	// Some AMD build optimizers, like r.js, check for specific condition patterns
+	// like the following:
+	if (
+		typeof define == 'function' &&
+		typeof define.amd == 'object' &&
+		define.amd
+	) {
+		define('punycode', function() {
+			return punycode;
+		});
+	} else if (freeExports && freeModule) {
+		if (module.exports == freeExports) {
+			// in Node.js, io.js, or RingoJS v0.8.0+
+			freeModule.exports = punycode;
+		} else {
+			// in Narwhal or RingoJS v0.7.0-
+			for (key in punycode) {
+				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
+			}
+		}
+	} else {
+		// in Rhino or a web browser
+		root.punycode = punycode;
+	}
+
+}(this));
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}]},{},[1]);