Fix test.

test/mjsunit/regexp-global.js

 // Copyright 2012 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 111 matching lines @@
                     assertTrue(likeability !== undefined);
                     if (num_legs == "FOUR") assertTrue(likeability == "GOOD");
                     if (num_legs == "TWO") assertTrue(likeability == "BAD");
                     return match.length - 7;
                   });
 assertEquals("4, 2!", str);
 
 // Test capture that is a real substring.
 var str = "Beasts of England, beasts of Ireland";
 str = str.replace(/(.*)/g, function(match) { return '~'; });
-assertEquals("~~");
+assertEquals("~~", str);