text: /*!
   * preserve <https://github.com/jonschlinkert/preserve>
   *
   * Copyright (c) 2014-2015, Jon Schlinkert.
   * Licensed under the MIT license.
   */
  
  'use strict';
  
  /**
   * Replace tokens in `str` with a temporary, heuristic placeholder.
   *
   * ```js
   * tokens.before('{a\\,b}');
   * //=> '{__ID1__}'
   * ```
   *
   * @param  {String} `str`
   * @return {String} String with placeholders.
   * @api public
   */
  
  exports.before = function before(str, re) {
      return str.replace(re, function (match) {
          var id = randomize();
          cache[id] = match;
          return '__ID' + id + '__';
      });
  };
  
  /**
   * Replace placeholders in `str` with original tokens.
   *
   * ```js
   * tokens.after('{__ID1__}');
   * //=> '{a\\,b}'
   * ```
   *
   * @param  {String} `str` String with placeholders
   * @return {String} `str` String with original tokens.
   * @api public
   */
  
  exports.after = function after(str) {
      return str.replace(/__ID(.{5})__/g, function (_, id) {
          return cache[id];
      });
  };
  
  function randomize() {
      return Math.random().toString().slice(2, 7);
  }
  
  var cache = {};