Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/object-literal-overwrite.js

 // Copyright 2010 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 61 matching lines @@
 assertEquals(7, foo2.bar);
 assertEquals(7, foo3.bar);
 assertEquals(7, foo4.bar());
 assertEquals(7, foo5[13]);
 assertEquals(7, foo6[14.31]);
 assertEquals(7, foo7[15]);
 
 // Test for the classic code generator.
 
 function fun(x) {
-  var inner = { j: function(x) { return x; }, j: 7 }; 
+  var inner = { j: function(x) { return x; }, j: 7 };
   return inner.j;
 }
 
 assertEquals(7, fun(7) );
 
 // Check that the initializers of computed properties are executed, even if
 // no store instructions are generated for the literals.
 
 var glob1 = 0;
 
@@ skipping 15 matching lines @@
 
 var glob3 = 0;
 
 function fun3() {
   var r = { 113: glob3++, 113: glob3++, 113: glob3++, 113: 7};
   return r[113];
 }
 
 var y = fun3();
 assertEquals(7, y);
-assertEquals(3, glob3);
+assertEquals(3, glob3);