rem: return this.map(function(pair) { return pair.map(encodeURIComponent).join('='); }).join('&'); 
add: return this.map(function(value, index) { return iterator(collections.pluck(index)); }); 
context:     return this.map(function(pair) {      return pair.map(encodeURIComponent).join('=');    }).join('&');
meta: 2801	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2801/7e143d2df37946a5416f0f043869478087652eb6/prototype.js/clean/examples/testcases/prototype.js