Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/regress/regress-1919169.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.
 
 
 function test() {
  var s2 = "s2";
  for (var i = 0; i < 2; i++) {
    // Crashes in round i==1 with IllegalAccess in %StringAdd(x,y)
-   var res = 1 + s2;  
+   var res = 1 + s2;
    s2 = 2;
  }
 }
 
 // Crash does not occur when code is run at the top level.
 test();