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: 3974	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3974/af9adbf17404d887f31369756326b0109da7ae2b/prototype.js/buggy/root/static/js/prototype.js