rem: return this.toArray().join(' '); 
add: return this.expression; 
context:   toString: function() {    return this.toArray().join(' ');  }
meta: 6601	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/6601/28b3187d07d97712c23182569a4d6fd00900b5f7/prototype.js/buggy/javascript/prototype/prototype.js