Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/regress/regress-269.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 22 matching lines @@
   if (event == Debug.DebugEvent.Break) {
     exec_state.prepareStep(Debug.StepAction.StepIn);
   }
 };
 
 // Add the debug event listener.
 Debug.setListener(listener);
 
 function g() {
 }
- 
+
 function f() {
   debugger;
   g.apply(null, ['']);
 }
 
-f()
+f()