Make more JS files beter match the coding standard.

test/mjsunit/regress/regress-877615.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 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 Number.prototype.toLocaleString = function() { return 'invalid'; };
 assertEquals('invalid', [1].toLocaleString());  // invalid
 
 Number.prototype.toLocaleString = 'invalid';
 assertThrows(function() { [1].toLocaleString(); });  // Not callable.
 
 delete Number.prototype.toLocaleString;
-Number.prototype.toString = function() { return 'invalid' };
+Number.prototype.toString = function() { return 'invalid'; };
 assertEquals([1].toLocaleString(), 'invalid');  // Uses ToObject on elements.
 assertEquals([1].toString(), '1');        // Uses ToString directly on elements.