Make sure files end with exactly one new line and police this in presubmit.

test/mjsunit/regress/regress-1181.js

 // Copyright 2011 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 33 matching lines @@
         for(var y=0; y < count; y++){
             i = test(x / 100);
         }
     }
     assertEquals((count - 1) / 100, i + 1);
 }
 
 
 check(150);
 check(200);
-check(350);
+check(350);