code: function updateIndent(info, dict, whitespaceNode) {
      var item = dict[info.id];
      if (!item)
          return whitespaceNode;
  
      var crPos = whitespaceNode.lastIndexOf('\n');
      var tabPos = whitespaceNode.lastIndexOf('\t');
      if (tabPos > crPos) crPos = tabPos;
  
      var firstPart = whitespaceNode.substr(0, crPos + 1);
      var extraIndent = new Array(
          (item.prefixLength - info.prefixLength) +
          (item.extra - info.extra) +
          whitespaceNode.length - firstPart.length +
          1).join(' ');
  
      return firstPart.concat(extraIndent);
    }
docs: Returns string with correct number of spaces for info.baseName property.
  
  @param {Object} info
  @param {Object} dict
  @param {String} whitespaceNode
  @returns {String}