1 files changed, 0 insertions, 946 deletions
diff --git a/client/node_modules/turndown/lib/turndown.cjs.js b/client/node_modules/turndown/lib/turndown.cjs.js
deleted file mode 100644
index 10f9b2e..0000000
--- a/client/node_modules/turndown/lib/turndown.cjs.js
+++ /dev/null
@@ -1,946 +0,0 @@
-'use strict';
-
-function extend (destination) {
-  for (var i = 1; i < arguments.length; i++) {
-    var source = arguments[i];
-    for (var key in source) {
-      if (source.hasOwnProperty(key)) destination[key] = source[key];
-    }
-  }
-  return destination
-}
-
-function repeat (character, count) {
-  return Array(count + 1).join(character)
-}
-
-function trimLeadingNewlines (string) {
-  return string.replace(/^\n*/, '')
-}
-
-function trimTrailingNewlines (string) {
-  // avoid match-at-end regexp bottleneck, see #370
-  var indexEnd = string.length;
-  while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
-  return string.substring(0, indexEnd)
-}
-
-var blockElements = [
-  'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
-  'CENTER', 'DD', 'DIR', 'DIV', 'DL', 'DT', 'FIELDSET', 'FIGCAPTION', 'FIGURE',
-  'FOOTER', 'FORM', 'FRAMESET', 'H1', 'H2', 'H3', 'H4', 'H5', 'H6', 'HEADER',
-  'HGROUP', 'HR', 'HTML', 'ISINDEX', 'LI', 'MAIN', 'MENU', 'NAV', 'NOFRAMES',
-  'NOSCRIPT', 'OL', 'OUTPUT', 'P', 'PRE', 'SECTION', 'TABLE', 'TBODY', 'TD',
-  'TFOOT', 'TH', 'THEAD', 'TR', 'UL'
-];
-
-function isBlock (node) {
-  return is(node, blockElements)
-}
-
-var voidElements = [
-  'AREA', 'BASE', 'BR', 'COL', 'COMMAND', 'EMBED', 'HR', 'IMG', 'INPUT',
-  'KEYGEN', 'LINK', 'META', 'PARAM', 'SOURCE', 'TRACK', 'WBR'
-];
-
-function isVoid (node) {
-  return is(node, voidElements)
-}
-
-function hasVoid (node) {
-  return has(node, voidElements)
-}
-
-var meaningfulWhenBlankElements = [
-  'A', 'TABLE', 'THEAD', 'TBODY', 'TFOOT', 'TH', 'TD', 'IFRAME', 'SCRIPT',
-  'AUDIO', 'VIDEO'
-];
-
-function isMeaningfulWhenBlank (node) {
-  return is(node, meaningfulWhenBlankElements)
-}
-
-function hasMeaningfulWhenBlank (node) {
-  return has(node, meaningfulWhenBlankElements)
-}
-
-function is (node, tagNames) {
-  return tagNames.indexOf(node.nodeName) >= 0
-}
-
-function has (node, tagNames) {
-  return (
-    node.getElementsByTagName &&
-    tagNames.some(function (tagName) {
-      return node.getElementsByTagName(tagName).length
-    })
-  )
-}
-
-var rules = {};
-
-rules.paragraph = {
-  filter: 'p',
-
-  replacement: function (content) {
-    return '\n\n' + content + '\n\n'
-  }
-};
-
-rules.lineBreak = {
-  filter: 'br',
-
-  replacement: function (content, node, options) {
-    return options.br + '\n'
-  }
-};
-
-rules.heading = {
-  filter: ['h1', 'h2', 'h3', 'h4', 'h5', 'h6'],
-
-  replacement: function (content, node, options) {
-    var hLevel = Number(node.nodeName.charAt(1));
-
-    if (options.headingStyle === 'setext' && hLevel < 3) {
-      var underline = repeat((hLevel === 1 ? '=' : '-'), content.length);
-      return (
-        '\n\n' + content + '\n' + underline + '\n\n'
-      )
-    } else {
-      return '\n\n' + repeat('#', hLevel) + ' ' + content + '\n\n'
-    }
-  }
-};
-
-rules.blockquote = {
-  filter: 'blockquote',
-
-  replacement: function (content) {
-    content = content.replace(/^\n+|\n+$/g, '');
-    content = content.replace(/^/gm, '> ');
-    return '\n\n' + content + '\n\n'
-  }
-};
-
-rules.list = {
-  filter: ['ul', 'ol'],
-
-  replacement: function (content, node) {
-    var parent = node.parentNode;
-    if (parent.nodeName === 'LI' && parent.lastElementChild === node) {
-      return '\n' + content
-    } else {
-      return '\n\n' + content + '\n\n'
-    }
-  }
-};
-
-rules.listItem = {
-  filter: 'li',
-
-  replacement: function (content, node, options) {
-    content = content
-      .replace(/^\n+/, '') // remove leading newlines
-      .replace(/\n+$/, '\n') // replace trailing newlines with just a single one
-      .replace(/\n/gm, '\n    '); // indent
-    var prefix = options.bulletListMarker + '   ';
-    var parent = node.parentNode;
-    if (parent.nodeName === 'OL') {
-      var start = parent.getAttribute('start');
-      var index = Array.prototype.indexOf.call(parent.children, node);
-      prefix = (start ? Number(start) + index : index + 1) + '.  ';
-    }
-    return (
-      prefix + content + (node.nextSibling && !/\n$/.test(content) ? '\n' : '')
-    )
-  }
-};
-
-rules.indentedCodeBlock = {
-  filter: function (node, options) {
-    return (
-      options.codeBlockStyle === 'indented' &&
-      node.nodeName === 'PRE' &&
-      node.firstChild &&
-      node.firstChild.nodeName === 'CODE'
-    )
-  },
-
-  replacement: function (content, node, options) {
-    return (
-      '\n\n    ' +
-      node.firstChild.textContent.replace(/\n/g, '\n    ') +
-      '\n\n'
-    )
-  }
-};
-
-rules.fencedCodeBlock = {
-  filter: function (node, options) {
-    return (
-      options.codeBlockStyle === 'fenced' &&
-      node.nodeName === 'PRE' &&
-      node.firstChild &&
-      node.firstChild.nodeName === 'CODE'
-    )
-  },
-
-  replacement: function (content, node, options) {
-    var className = node.firstChild.getAttribute('class') || '';
-    var language = (className.match(/language-(\S+)/) || [null, ''])[1];
-    var code = node.firstChild.textContent;
-
-    var fenceChar = options.fence.charAt(0);
-    var fenceSize = 3;
-    var fenceInCodeRegex = new RegExp('^' + fenceChar + '{3,}', 'gm');
-
-    var match;
-    while ((match = fenceInCodeRegex.exec(code))) {
-      if (match[0].length >= fenceSize) {
-        fenceSize = match[0].length + 1;
-      }
-    }
-
-    var fence = repeat(fenceChar, fenceSize);
-
-    return (
-      '\n\n' + fence + language + '\n' +
-      code.replace(/\n$/, '') +
-      '\n' + fence + '\n\n'
-    )
-  }
-};
-
-rules.horizontalRule = {
-  filter: 'hr',
-
-  replacement: function (content, node, options) {
-    return '\n\n' + options.hr + '\n\n'
-  }
-};
-
-rules.inlineLink = {
-  filter: function (node, options) {
-    return (
-      options.linkStyle === 'inlined' &&
-      node.nodeName === 'A' &&
-      node.getAttribute('href')
-    )
-  },
-
-  replacement: function (content, node) {
-    var href = node.getAttribute('href');
-    var title = cleanAttribute(node.getAttribute('title'));
-    if (title) title = ' "' + title + '"';
-    return '[' + content + '](' + href + title + ')'
-  }
-};
-
-rules.referenceLink = {
-  filter: function (node, options) {
-    return (
-      options.linkStyle === 'referenced' &&
-      node.nodeName === 'A' &&
-      node.getAttribute('href')
-    )
-  },
-
-  replacement: function (content, node, options) {
-    var href = node.getAttribute('href');
-    var title = cleanAttribute(node.getAttribute('title'));
-    if (title) title = ' "' + title + '"';
-    var replacement;
-    var reference;
-
-    switch (options.linkReferenceStyle) {
-      case 'collapsed':
-        replacement = '[' + content + '][]';
-        reference = '[' + content + ']: ' + href + title;
-        break
-      case 'shortcut':
-        replacement = '[' + content + ']';
-        reference = '[' + content + ']: ' + href + title;
-        break
-      default:
-        var id = this.references.length + 1;
-        replacement = '[' + content + '][' + id + ']';
-        reference = '[' + id + ']: ' + href + title;
-    }
-
-    this.references.push(reference);
-    return replacement
-  },
-
-  references: [],
-
-  append: function (options) {
-    var references = '';
-    if (this.references.length) {
-      references = '\n\n' + this.references.join('\n') + '\n\n';
-      this.references = []; // Reset references
-    }
-    return references
-  }
-};
-
-rules.emphasis = {
-  filter: ['em', 'i'],
-
-  replacement: function (content, node, options) {
-    if (!content.trim()) return ''
-    return options.emDelimiter + content + options.emDelimiter
-  }
-};
-
-rules.strong = {
-  filter: ['strong', 'b'],
-
-  replacement: function (content, node, options) {
-    if (!content.trim()) return ''
-    return options.strongDelimiter + content + options.strongDelimiter
-  }
-};
-
-rules.code = {
-  filter: function (node) {
-    var hasSiblings = node.previousSibling || node.nextSibling;
-    var isCodeBlock = node.parentNode.nodeName === 'PRE' && !hasSiblings;
-
-    return node.nodeName === 'CODE' && !isCodeBlock
-  },
-
-  replacement: function (content) {
-    if (!content) return ''
-    content = content.replace(/\r?\n|\r/g, ' ');
-
-    var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
-    var delimiter = '`';
-    var matches = content.match(/`+/gm) || [];
-    while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-
-    return delimiter + extraSpace + content + extraSpace + delimiter
-  }
-};
-
-rules.image = {
-  filter: 'img',
-
-  replacement: function (content, node) {
-    var alt = cleanAttribute(node.getAttribute('alt'));
-    var src = node.getAttribute('src') || '';
-    var title = cleanAttribute(node.getAttribute('title'));
-    var titlePart = title ? ' "' + title + '"' : '';
-    return src ? '![' + alt + ']' + '(' + src + titlePart + ')' : ''
-  }
-};
-
-function cleanAttribute (attribute) {
-  return attribute ? attribute.replace(/(\n+\s*)+/g, '\n') : ''
-}
-
-/**
- * Manages a collection of rules used to convert HTML to Markdown
- */
-
-function Rules (options) {
-  this.options = options;
-  this._keep = [];
-  this._remove = [];
-
-  this.blankRule = {
-    replacement: options.blankReplacement
-  };
-
-  this.keepReplacement = options.keepReplacement;
-
-  this.defaultRule = {
-    replacement: options.defaultReplacement
-  };
-
-  this.array = [];
-  for (var key in options.rules) this.array.push(options.rules[key]);
-}
-
-Rules.prototype = {
-  add: function (key, rule) {
-    this.array.unshift(rule);
-  },
-
-  keep: function (filter) {
-    this._keep.unshift({
-      filter: filter,
-      replacement: this.keepReplacement
-    });
-  },
-
-  remove: function (filter) {
-    this._remove.unshift({
-      filter: filter,
-      replacement: function () {
-        return ''
-      }
-    });
-  },
-
-  forNode: function (node) {
-    if (node.isBlank) return this.blankRule
-    var rule;
-
-    if ((rule = findRule(this.array, node, this.options))) return rule
-    if ((rule = findRule(this._keep, node, this.options))) return rule
-    if ((rule = findRule(this._remove, node, this.options))) return rule
-
-    return this.defaultRule
-  },
-
-  forEach: function (fn) {
-    for (var i = 0; i < this.array.length; i++) fn(this.array[i], i);
-  }
-};
-
-function findRule (rules, node, options) {
-  for (var i = 0; i < rules.length; i++) {
-    var rule = rules[i];
-    if (filterValue(rule, node, options)) return rule
-  }
-  return void 0
-}
-
-function filterValue (rule, node, options) {
-  var filter = rule.filter;
-  if (typeof filter === 'string') {
-    if (filter === node.nodeName.toLowerCase()) return true
-  } else if (Array.isArray(filter)) {
-    if (filter.indexOf(node.nodeName.toLowerCase()) > -1) return true
-  } else if (typeof filter === 'function') {
-    if (filter.call(rule, node, options)) return true
-  } else {
-    throw new TypeError('`filter` needs to be a string, array, or function')
-  }
-}
-
-/**
- * The collapseWhitespace function is adapted from collapse-whitespace
- * by Luc Thevenard.
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2014 Luc Thevenard <lucthevenard@gmail.com>
- *
- * 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.
- */
-
-/**
- * collapseWhitespace(options) removes extraneous whitespace from an the given element.
- *
- * @param {Object} options
- */
-function collapseWhitespace (options) {
-  var element = options.element;
-  var isBlock = options.isBlock;
-  var isVoid = options.isVoid;
-  var isPre = options.isPre || function (node) {
-    return node.nodeName === 'PRE'
-  };
-
-  if (!element.firstChild || isPre(element)) return
-
-  var prevText = null;
-  var keepLeadingWs = false;
-
-  var prev = null;
-  var node = next(prev, element, isPre);
-
-  while (node !== element) {
-    if (node.nodeType === 3 || node.nodeType === 4) { // Node.TEXT_NODE or Node.CDATA_SECTION_NODE
-      var text = node.data.replace(/[ \r\n\t]+/g, ' ');
-
-      if ((!prevText || / $/.test(prevText.data)) &&
-          !keepLeadingWs && text[0] === ' ') {
-        text = text.substr(1);
-      }
-
-      // `text` might be empty at this point.
-      if (!text) {
-        node = remove(node);
-        continue
-      }
-
-      node.data = text;
-
-      prevText = node;
-    } else if (node.nodeType === 1) { // Node.ELEMENT_NODE
-      if (isBlock(node) || node.nodeName === 'BR') {
-        if (prevText) {
-          prevText.data = prevText.data.replace(/ $/, '');
-        }
-
-        prevText = null;
-        keepLeadingWs = false;
-      } else if (isVoid(node) || isPre(node)) {
-        // Avoid trimming space around non-block, non-BR void elements and inline PRE.
-        prevText = null;
-        keepLeadingWs = true;
-      } else if (prevText) {
-        // Drop protection if set previously.
-        keepLeadingWs = false;
-      }
-    } else {
-      node = remove(node);
-      continue
-    }
-
-    var nextNode = next(prev, node, isPre);
-    prev = node;
-    node = nextNode;
-  }
-
-  if (prevText) {
-    prevText.data = prevText.data.replace(/ $/, '');
-    if (!prevText.data) {
-      remove(prevText);
-    }
-  }
-}
-
-/**
- * remove(node) removes the given node from the DOM and returns the
- * next node in the sequence.
- *
- * @param {Node} node
- * @return {Node} node
- */
-function remove (node) {
-  var next = node.nextSibling || node.parentNode;
-
-  node.parentNode.removeChild(node);
-
-  return next
-}
-
-/**
- * next(prev, current, isPre) returns the next node in the sequence, given the
- * current and previous nodes.
- *
- * @param {Node} prev
- * @param {Node} current
- * @param {Function} isPre
- * @return {Node}
- */
-function next (prev, current, isPre) {
-  if ((prev && prev.parentNode === current) || isPre(current)) {
-    return current.nextSibling || current.parentNode
-  }
-
-  return current.firstChild || current.nextSibling || current.parentNode
-}
-
-/*
- * Set up window for Node.js
- */
-
-var root = (typeof window !== 'undefined' ? window : {});
-
-/*
- * Parsing HTML strings
- */
-
-function canParseHTMLNatively () {
-  var Parser = root.DOMParser;
-  var canParse = false;
-
-  // Adapted from https://gist.github.com/1129031
-  // Firefox/Opera/IE throw errors on unsupported types
-  try {
-    // WebKit returns null on unsupported types
-    if (new Parser().parseFromString('', 'text/html')) {
-      canParse = true;
-    }
-  } catch (e) {}
-
-  return canParse
-}
-
-function createHTMLParser () {
-  var Parser = function () {};
-
-  {
-    var domino = require('domino');
-    Parser.prototype.parseFromString = function (string) {
-      return domino.createDocument(string)
-    };
-  }
-  return Parser
-}
-
-var HTMLParser = canParseHTMLNatively() ? root.DOMParser : createHTMLParser();
-
-function RootNode (input, options) {
-  var root;
-  if (typeof input === 'string') {
-    var doc = htmlParser().parseFromString(
-      // DOM parsers arrange elements in the <head> and <body>.
-      // Wrapping in a custom element ensures elements are reliably arranged in
-      // a single element.
-      '<x-turndown id="turndown-root">' + input + '</x-turndown>',
-      'text/html'
-    );
-    root = doc.getElementById('turndown-root');
-  } else {
-    root = input.cloneNode(true);
-  }
-  collapseWhitespace({
-    element: root,
-    isBlock: isBlock,
-    isVoid: isVoid,
-    isPre: options.preformattedCode ? isPreOrCode : null
-  });
-
-  return root
-}
-
-var _htmlParser;
-function htmlParser () {
-  _htmlParser = _htmlParser || new HTMLParser();
-  return _htmlParser
-}
-
-function isPreOrCode (node) {
-  return node.nodeName === 'PRE' || node.nodeName === 'CODE'
-}
-
-function Node (node, options) {
-  node.isBlock = isBlock(node);
-  node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
-  node.isBlank = isBlank(node);
-  node.flankingWhitespace = flankingWhitespace(node, options);
-  return node
-}
-
-function isBlank (node) {
-  return (
-    !isVoid(node) &&
-    !isMeaningfulWhenBlank(node) &&
-    /^\s*$/i.test(node.textContent) &&
-    !hasVoid(node) &&
-    !hasMeaningfulWhenBlank(node)
-  )
-}
-
-function flankingWhitespace (node, options) {
-  if (node.isBlock || (options.preformattedCode && node.isCode)) {
-    return { leading: '', trailing: '' }
-  }
-
-  var edges = edgeWhitespace(node.textContent);
-
-  // abandon leading ASCII WS if left-flanked by ASCII WS
-  if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
-    edges.leading = edges.leadingNonAscii;
-  }
-
-  // abandon trailing ASCII WS if right-flanked by ASCII WS
-  if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
-    edges.trailing = edges.trailingNonAscii;
-  }
-
-  return { leading: edges.leading, trailing: edges.trailing }
-}
-
-function edgeWhitespace (string) {
-  var m = string.match(/^(([ \t\r\n]*)(\s*))(?:(?=\S)[\s\S]*\S)?((\s*?)([ \t\r\n]*))$/);
-  return {
-    leading: m[1], // whole string for whitespace-only strings
-    leadingAscii: m[2],
-    leadingNonAscii: m[3],
-    trailing: m[4], // empty for whitespace-only strings
-    trailingNonAscii: m[5],
-    trailingAscii: m[6]
-  }
-}
-
-function isFlankedByWhitespace (side, node, options) {
-  var sibling;
-  var regExp;
-  var isFlanked;
-
-  if (side === 'left') {
-    sibling = node.previousSibling;
-    regExp = / $/;
-  } else {
-    sibling = node.nextSibling;
-    regExp = /^ /;
-  }
-
-  if (sibling) {
-    if (sibling.nodeType === 3) {
-      isFlanked = regExp.test(sibling.nodeValue);
-    } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
-      isFlanked = false;
-    } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
-      isFlanked = regExp.test(sibling.textContent);
-    }
-  }
-  return isFlanked
-}
-
-var reduce = Array.prototype.reduce;
-var escapes = [
-  [/\\/g, '\\\\'],
-  [/\*/g, '\\*'],
-  [/^-/g, '\\-'],
-  [/^\+ /g, '\\+ '],
-  [/^(=+)/g, '\\$1'],
-  [/^(#{1,6}) /g, '\\$1 '],
-  [/`/g, '\\`'],
-  [/^~~~/g, '\\~~~'],
-  [/\[/g, '\\['],
-  [/\]/g, '\\]'],
-  [/^>/g, '\\>'],
-  [/_/g, '\\_'],
-  [/^(\d+)\. /g, '$1\\. ']
-];
-
-function TurndownService (options) {
-  if (!(this instanceof TurndownService)) return new TurndownService(options)
-
-  var defaults = {
-    rules: rules,
-    headingStyle: 'setext',
-    hr: '* * *',
-    bulletListMarker: '*',
-    codeBlockStyle: 'indented',
-    fence: '```',
-    emDelimiter: '_',
-    strongDelimiter: '**',
-    linkStyle: 'inlined',
-    linkReferenceStyle: 'full',
-    br: '  ',
-    preformattedCode: false,
-    blankReplacement: function (content, node) {
-      return node.isBlock ? '\n\n' : ''
-    },
-    keepReplacement: function (content, node) {
-      return node.isBlock ? '\n\n' + node.outerHTML + '\n\n' : node.outerHTML
-    },
-    defaultReplacement: function (content, node) {
-      return node.isBlock ? '\n\n' + content + '\n\n' : content
-    }
-  };
-  this.options = extend({}, defaults, options);
-  this.rules = new Rules(this.options);
-}
-
-TurndownService.prototype = {
-  /**
-   * The entry point for converting a string or DOM node to Markdown
-   * @public
-   * @param {String|HTMLElement} input The string or DOM node to convert
-   * @returns A Markdown representation of the input
-   * @type String
-   */
-
-  turndown: function (input) {
-    if (!canConvert(input)) {
-      throw new TypeError(
-        input + ' is not a string, or an element/document/fragment node.'
-      )
-    }
-
-    if (input === '') return ''
-
-    var output = process.call(this, new RootNode(input, this.options));
-    return postProcess.call(this, output)
-  },
-
-  /**
-   * Add one or more plugins
-   * @public
-   * @param {Function|Array} plugin The plugin or array of plugins to add
-   * @returns The Turndown instance for chaining
-   * @type Object
-   */
-
-  use: function (plugin) {
-    if (Array.isArray(plugin)) {
-      for (var i = 0; i < plugin.length; i++) this.use(plugin[i]);
-    } else if (typeof plugin === 'function') {
-      plugin(this);
-    } else {
-      throw new TypeError('plugin must be a Function or an Array of Functions')
-    }
-    return this
-  },
-
-  /**
-   * Adds a rule
-   * @public
-   * @param {String} key The unique key of the rule
-   * @param {Object} rule The rule
-   * @returns The Turndown instance for chaining
-   * @type Object
-   */
-
-  addRule: function (key, rule) {
-    this.rules.add(key, rule);
-    return this
-  },
-
-  /**
-   * Keep a node (as HTML) that matches the filter
-   * @public
-   * @param {String|Array|Function} filter The unique key of the rule
-   * @returns The Turndown instance for chaining
-   * @type Object
-   */
-
-  keep: function (filter) {
-    this.rules.keep(filter);
-    return this
-  },
-
-  /**
-   * Remove a node that matches the filter
-   * @public
-   * @param {String|Array|Function} filter The unique key of the rule
-   * @returns The Turndown instance for chaining
-   * @type Object
-   */
-
-  remove: function (filter) {
-    this.rules.remove(filter);
-    return this
-  },
-
-  /**
-   * Escapes Markdown syntax
-   * @public
-   * @param {String} string The string to escape
-   * @returns A string with Markdown syntax escaped
-   * @type String
-   */
-
-  escape: function (string) {
-    return escapes.reduce(function (accumulator, escape) {
-      return accumulator.replace(escape[0], escape[1])
-    }, string)
-  }
-};
-
-/**
- * Reduces a DOM node down to its Markdown string equivalent
- * @private
- * @param {HTMLElement} parentNode The node to convert
- * @returns A Markdown representation of the node
- * @type String
- */
-
-function process (parentNode) {
-  var self = this;
-  return reduce.call(parentNode.childNodes, function (output, node) {
-    node = new Node(node, self.options);
-
-    var replacement = '';
-    if (node.nodeType === 3) {
-      replacement = node.isCode ? node.nodeValue : self.escape(node.nodeValue);
-    } else if (node.nodeType === 1) {
-      replacement = replacementForNode.call(self, node);
-    }
-
-    return join(output, replacement)
-  }, '')
-}
-
-/**
- * Appends strings as each rule requires and trims the output
- * @private
- * @param {String} output The conversion output
- * @returns A trimmed version of the ouput
- * @type String
- */
-
-function postProcess (output) {
-  var self = this;
-  this.rules.forEach(function (rule) {
-    if (typeof rule.append === 'function') {
-      output = join(output, rule.append(self.options));
-    }
-  });
-
-  return output.replace(/^[\t\r\n]+/, '').replace(/[\t\r\n\s]+$/, '')
-}
-
-/**
- * Converts an element node to its Markdown equivalent
- * @private
- * @param {HTMLElement} node The node to convert
- * @returns A Markdown representation of the node
- * @type String
- */
-
-function replacementForNode (node) {
-  var rule = this.rules.forNode(node);
-  var content = process.call(this, node);
-  var whitespace = node.flankingWhitespace;
-  if (whitespace.leading || whitespace.trailing) content = content.trim();
-  return (
-    whitespace.leading +
-    rule.replacement(content, node, this.options) +
-    whitespace.trailing
-  )
-}
-
-/**
- * Joins replacement to the current output with appropriate number of new lines
- * @private
- * @param {String} output The current conversion output
- * @param {String} replacement The string to append to the output
- * @returns Joined output
- * @type String
- */
-
-function join (output, replacement) {
-  var s1 = trimTrailingNewlines(output);
-  var s2 = trimLeadingNewlines(replacement);
-  var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
-  var separator = '\n\n'.substring(0, nls);
-
-  return s1 + separator + s2
-}
-
-/**
- * Determines whether an input can be converted
- * @private
- * @param {String|HTMLElement} input Describe this parameter
- * @returns Describe what it returns
- * @type String|Object|Array|Boolean|Number
- */
-
-function canConvert (input) {
-  return (
-    input != null && (
-      typeof input === 'string' ||
-      (input.nodeType && (
-        input.nodeType === 1 || input.nodeType === 9 || input.nodeType === 11
-      ))
-    )
-  )
-}
-
-module.exports = TurndownService;