text: /// Copyright (c) 2012 Ecma International.  All rights reserved. 
  /**
   * @path ch15/15.12/15.12.3/15.12.3-8-a-1.js
   * @description JSON.stringify treats an empty string space argument the same as a missing space argument.
   */
  
  
  function testcase() {
    var obj = {a1: {b1: [1,2,3,4], b2: {c1: 1, c2: 2}},a2: 'a2'};
    return JSON.stringify(obj)=== JSON.stringify(obj,null, '');
    }
  runTestCase(testcase);
  