Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/function-source.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 18 matching lines @@
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
 // Check that the script source for all functions in a script is the same.
 function f() {
   function h() {
     assertEquals(Debug.scriptSource(f), Debug.scriptSource(h));
   }
   h();
 }
-  
+
 function g() {
   function h() {
     assertEquals(Debug.scriptSource(f), Debug.scriptSource(h));
   }
   h();
 }
 
 assertEquals(Debug.scriptSource(f), Debug.scriptSource(g));
 f();
 g();