[Contributing] Removed superfluous newline at end of file

Author: manuelkiessling

contributing/code/patches.rst

@@ -301,4 +301,4 @@ the `2.0` branch, the patch will also be applied by the core team on the
 .. _dev mailing-list:    http://groups.google.com/group/symfony-devs
 .. _travis-ci.org:       http://travis-ci.org
 .. _`travis-ci.org status icon`: http://about.travis-ci.org/docs/user/status-images/
-.. _`travis-ci.org Getting Started Guide`: http://about.travis-ci.org/docs/user/getting-started/
+.. _`travis-ci.org Getting Started Guide`: http://about.travis-ci.org/docs/user/getting-started/