Remove trailing whitespaces in regular file

Change-Id: I5faf840dd6649afcb53e91f1d033447f9729cee1
diff --git a/AUTHORS b/AUTHORS
index a3a4b6b..d1a9fcd 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -9,6 +9,7 @@
 Eddie Hebert <edhebert@gmail.com>
 Eoghan Glynn <eglynn@redhat.com>
 Gabriel Hurley <gabriel@strikeawe.com>
+Hengqing Hu <hudayou@hotmail.com>
 Jake Dahn <admin@jakedahn.com>
 James E. Blair <james.blair@rackspace.com>
 Jason Cannavale <jason.cannavale@rackspace.com>