rem: function (a) { return a != sentinel; }, 
add: return self.takewhile(function(a){ return a!=_131; },_130); 
context:                 function (a) { return a != sentinel; },
meta: 8607	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8607/ad067b3f5d648d6df90ec6fb2b79f0027612a307/MochiKit.js/buggy/trunk/lib/MochiKit.js