Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/keyed-storage-extend.js

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 19 matching lines @@
 function GrowNamed(o) {
   o.a = 1;
   o.b = 2;
   o.c = 3;
   o.d = 4;
   o.e = 5;
   o.f = 6;
 }
 
 function GrowKeyed(o) {
-  var names = ['a','b','c','d','e','f']; 
+  var names = ['a','b','c','d','e','f'];
   var i = 0;
   o[names[i++]] = i;
   o[names[i++]] = i;
   o[names[i++]] = i;
   o[names[i++]] = i;
   o[names[i++]] = i;
   o[names[i++]] = i;
 }
 
 GrowNamed(new F());
 GrowNamed(new F());
 GrowNamed(new F());
 GrowKeyed(new F());
 GrowKeyed(new F());
 GrowKeyed(new F());