Handle extra whitespaces in the DOM token list

third_party/WebKit/LayoutTests/fast/dom/HTMLOutputElement/script-tests/dom-settable-token-list.js

 // This test mostly comes from fast/dom/HTMLElement/script-tests/class-list.js
 description('Tests the htmlFor attribute and its properties.');
 
 var container = document.createElement('div');
 document.body.appendChild(container);
 
 var element;
 
 function createElement(tokenList)
 {
@@ skipping 53 matching lines @@
 shouldBeEqualToString('element.htmlFor.toString()', '');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/010.htm
 createElement('x');
 element.htmlFor.remove('x');
 shouldBeEqualToString('element.htmlFor.toString()', '');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/011.htm
 createElement(' y x  y ');
 element.htmlFor.remove('x');
-shouldBeEqualToString('element.htmlFor.toString()', ' y y ');
+shouldBeEqualToString('element.htmlFor.toString()', 'y y');
 
 // http://simon.html5.org/test/html/dom/reflecting/DOMTokenList/getting/012.htm
 createElement(' x y  x ');
 element.htmlFor.remove('x');
 shouldBeEqualToString('element.htmlFor.toString()', 'y');
 
 
 debug('- Ensure that we can handle empty form attribute correctly');
 element = document.createElement('output');
 var list = element.htmlFor;
@@ skipping 161 matching lines @@
 shouldBeTrue('\'undefined\' != typeof DOMSettableTokenList');
 
 shouldBeEqualToString('typeof DOMSettableTokenList.prototype', 'object');
 
 createElement('x');
 shouldBeEqualToString('typeof element.htmlFor', 'object');
 
 shouldEvaluateTo('element.htmlFor.constructor', 'DOMSettableTokenList');
 
 shouldBeTrue('element.htmlFor === element.htmlFor');