Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/string-indexof-2.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 39 matching lines @@
 
 assertEquals(893, lipsum.indexOf("lorem ipsum, quia dolor sit, amet"),
         "Lipsum");
 // test a lot of substrings of differing length and start-position.
 for(var i = 0; i < lipsum.length; i += 3) {
   for(var len = 1; i + len < lipsum.length; len += 7) {
     var substring = lipsum.substring(i, i + len);
     var index = -1;
     do {
       index = lipsum.indexOf(substring, index + 1);
-      assertTrue(index != -1, 
+      assertTrue(index != -1,
                  "Lipsum substring " + i + ".." + (i + len-1) + " not found");
-      assertEquals(lipsum.substring(index, index + len), substring, 
-          "Wrong lipsum substring found: " + i + ".." + (i + len - 1) + "/" + 
+      assertEquals(lipsum.substring(index, index + len), substring,
+          "Wrong lipsum substring found: " + i + ".." + (i + len - 1) + "/" +
               index + ".." + (index + len - 1));
     } while (index >= 0 && index < i);
     assertEquals(i, index, "Lipsum match at " + i + ".." + (i + len - 1));
   }
 }