Make more JS files beter match the coding standard.

test/mjsunit/string-add.js

 // Copyright 2009 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 171 matching lines @@
 var a = Array(21);
 var b = Array(21);
 for (var i = 0; i <= 20; i++) {
   a[i] = ascii.substring(0, i);
   b[i] = non_ascii.substring(0, i);
 }
 
 // Add ascii and non-ascii strings generating strings with length from 0 to 20.
 for (var i = 0; i <= 20; i++) {
   for (var j = 0; j < i; j++) {
-    assertEquals(a[i], a[j] + a[i - j])
-    assertEquals(b[i], b[j] + b[i - j])
+    assertEquals(a[i], a[j] + a[i - j]);
+    assertEquals(b[i], b[j] + b[i - j]);
   }
 }