rem: return this.map(function(pair) { return pair.map(encodeURIComponent).join('='); }).join('&'); 
add: return this.select(function(value) { return !values.include(value); }); 
context:     return this.map(function(pair) {      return pair.map(encodeURIComponent).join('=');    }).join('&');
meta: 1206	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1206/81ea0800bc8ad92d491743716cd489cad7333723/prototype.js/buggy/vendor/rails/railties/html/javascripts/prototype.js