Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/regress/regress-678525.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 @@
 assertEquals(1,  '\1'.charCodeAt(0));
 assertEquals(2,  '\2'.charCodeAt(0));
 assertEquals(3,  '\3'.charCodeAt(0));
 assertEquals(4,  '\4'.charCodeAt(0));
 assertEquals(5,  '\5'.charCodeAt(0));
 assertEquals(6,  '\6'.charCodeAt(0));
 assertEquals(7,  '\7'.charCodeAt(0));
 assertEquals(56, '\8'.charCodeAt(0));
 
 assertEquals('\010', '\10');
-assertEquals('\011', '\11');    
+assertEquals('\011', '\11');
 assertEquals('\012', '\12');
 assertEquals('\013', '\13');
 assertEquals('\014', '\14');
 assertEquals('\015', '\15');
 assertEquals('\016', '\16');
 assertEquals('\017', '\17');
-    
+
 assertEquals('\020', '\20');
-assertEquals('\021', '\21');    
+assertEquals('\021', '\21');
 assertEquals('\022', '\22');
 assertEquals('\023', '\23');
 assertEquals('\024', '\24');
 assertEquals('\025', '\25');
 assertEquals('\026', '\26');
 assertEquals('\027', '\27');
 
 assertEquals(73,  '\111'.charCodeAt(0));
 assertEquals(105, '\151'.charCodeAt(0));
 
-    
+