Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/substr.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 37 matching lines @@
 assertEquals(s.substring(s.length - 1), s.substr(-1));
 assertEquals(s.substring(s.length - 1), s.substr(-1.2));
 assertEquals(s.substring(s.length - 1), s.substr(-1.7));
 assertEquals(s.substring(s.length - 2), s.substr(-2));
 assertEquals(s.substring(s.length - 2), s.substr(-2.3));
 assertEquals(s.substring(s.length - 2, s.length - 1), s.substr(-2, 1));
 assertEquals(s, s.substr(-100));
 assertEquals('abc', s.substr(-100, 3));
 assertEquals(s1, s.substr(-s.length + 1));
 
-// assertEquals('', s.substr(0, void 0)); // smjs and rhino 
+// assertEquals('', s.substr(0, void 0)); // smjs and rhino
 assertEquals('abcdefghijklmn', s.substr(0, void 0));  // kjs and v8
 assertEquals('', s.substr(0, null));
 assertEquals(s, s.substr(0, String(s.length)));
 assertEquals('a', s.substr(0, true));
 
 
 // Test substrings of different lengths and alignments.
 // First ASCII.
 var x = "ASCII";
 for (var i = 0; i < 25; i++) {
@@ skipping 76 matching lines @@
   last = z;
   cache.push(z);
   offset += i;
 }
 for (var i = 63; i >= 0; i--) {
   var z = cache.pop();
   assertTrue(/\u2028123456789ABCDEF/.test(z));
   assertEquals(xl - offset, z.length);
   offset -= i;
 }