Git commits in Moodle 2.3.7 by Ryan Panning

commit 3b89216c24e28c57f4e69cf1e4a902885add2fb5
Author: Ryan Panning <Ryan.Panning@district196.org>
Date:   Wed, 10 Apr 2013 14:38:05 +0800
Tag:    v2.3.7

MDL-38525: Assignment - print exception message when assignment upgrade fails.