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

test/webkit/dfg-cfg-simplify-phantom-get-local-on-same-block-set-local.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  Redistributions in binary form must reproduce the above copyright
 //     notice, this list of conditions and the following disclaimer in the
@@ skipping 42 matching lines @@
     if (p.f) {
         // Basic block that stores to x in foo(), which is a captured variable, with
         // the predecessor block making no mention of x.
         result = foo("hello", 2);
     }
     return result;
 }
 
 for (var i = 0; i < 200; ++i)
     shouldBe("thingy(o)", "42");
-