text: var jade = (function(exports){
  /*!
   * Jade - runtime
   * Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
   * MIT Licensed
   */
  
  /**
   * Lame Array.isArray() polyfill for now.
   */
  
  if (!Array.isArray) {
    Array.isArray = function(arr){
      return '[object Array]' == Object.prototype.toString.call(arr);
    };
  }
  
  /**
   * Lame Object.keys() polyfill for now.
   */
  
  if (!Object.keys) {
    Object.keys = function(obj){
      var arr = [];
      for (var key in obj) {
        if (obj.hasOwnProperty(key)) {
          arr.push(key);
        }
      }
      return arr;
    } 
  }
  
  /**
   * Render the given attributes object.
   *
   * @param {Object} obj
   * @return {String}
   * @api private
   */
  
  exports.attrs = function attrs(obj){
    var buf = []
      , terse = obj.terse;
    delete obj.terse;
    var keys = Object.keys(obj)
      , len = keys.length;
    if (len) {
      buf.push('');
      for (var i = 0; i < len; ++i) {
        var key = keys[i]
          , val = obj[key];
        if ('boolean' == typeof val || null == val) {
          if (val) {
            terse
              ? buf.push(key)
              : buf.push(key + '="' + key + '"');
          }
        } else if ('class' == key && Array.isArray(val)) {
          buf.push(key + '="' + exports.escape(val.join(' ')) + '"');
        } else {
          buf.push(key + '="' + exports.escape(val) + '"');
        }
      }
    }
    return buf.join(' ');
  };
  
  /**
   * Escape the given string of `html`.
   *
   * @param {String} html
   * @return {String}
   * @api private
   */
  
  exports.escape = function escape(html){
    return String(html)
      .replace(/&(?!\w+;)/g, '&amp;')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;');
  };
  
  /**
   * Re-throw the given `err` in context to the
   * the jade in `filename` at the given `lineno`.
   *
   * @param {Error} err
   * @param {String} filename
   * @param {String} lineno
   * @api private
   */
  
  exports.rethrow = function rethrow(err, filename, lineno){
    if (!filename) throw err;
  
    var context = 3
      , str = require('fs').readFileSync(filename, 'utf8')
      , lines = str.split('\n')
      , start = Math.max(lineno - context, 0)
      , end = Math.min(lines.length, lineno + context); 
  
    // Error context
    var context = lines.slice(start, end).map(function(line, i){
      var curr = i + start + 1;
      return (curr == lineno ? '  > ' : '    ')
        + curr
        + '| '
        + line;
    }).join('\n');
  
    // Alter exception message
    err.path = filename;
    err.message = (filename || 'Jade') + ':' + lineno 
      + '\n' + context + '\n\n' + err.message;
    throw err;
  };
  
    return exports;
  
  })({});