Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/no-semicolon.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 12 matching lines @@
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Random tests to make sure you can leave out semicolons
 // in various places.
 
 function f() { return }
 
-function g() { 
+function g() {
   return
     4;
 }
 
 assertTrue(f() === void 0);
 assertTrue(g() === void 0);
 
 for (var i = 0; i < 10; i++) { break }
 assertEquals(0, i);
 
 for (var i = 0; i < 10; i++) { continue }
-assertEquals(10, i);
+assertEquals(10, i);