Git commits in Moodle 2.3.7 by Aaron Barnes

commit dce8cb057642e0a105cbd619e0d0ab6532f209da
Author: Aaron Barnes <aaron.barnes@hbcosmo.com>
Date:   Sat, 06 Apr 2013 18:33:19 +0800
Tag:    v2.3.7

MDL-37537 completion: Fix incorrect lang string reference in block