rem: this.set(this.select(function(className) { return className != classNameToRemove; }).join(' ')); 
add: this.element.className.split(/\s+/).select(function(name) { return name.length > 0; })._each(iterator); 
context:     this.set(this.select(function(className) {      return className != classNameToRemove;    }).join(' '));
meta: 942	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/942/bb2276098a5a21c35e5ee72b3097bd9d7caa919f/prototype.js/buggy/railties/html/javascripts/prototype.js