rem: return this.map(function(pair) { return pair.map(encodeURIComponent).join('='); }).join('&'); 
add: return $H(hash).inject($H(this), function(mergedHash, pair) { mergedHash[pair.key] = pair.value; return mergedHash; }); 
context:     return this.map(function(pair) {      return pair.map(encodeURIComponent).join('=');    }).join('&');
meta: 2320	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2320/19200c26046dc00f15305e03b7c1d28b4c38c952/prototype.js/clean/web/scripts/prototype.js