Added check for trailing whitespaces and corrected existing violations.

test/mjsunit/regress/regress-696.js

Index: test/mjsunit/regress/regress-696.js
diff --git a/test/mjsunit/regress/regress-696.js b/test/mjsunit/regress/regress-696.js
index 21977e1c822c2cc5c2591d33913cbcf676cce09e..e443c4243dc863c053a13a06c29affe0c257dce8 100644
--- a/test/mjsunit/regress/regress-696.js
+++ b/test/mjsunit/regress/regress-696.js
@@ -28,7 +28,7 @@
 // See: http://code.google.com/p/v8/issues/detail?id=696
 // Because of the change in dateparser in revision 4557 to support time
 // only strings in Date.parse we also misleadingly supported strings with non
-// leading numbers. 
+// leading numbers.
 
 assertTrue(isNaN(Date.parse('x')));
 assertTrue(isNaN(Date.parse('1x')));