Git commits in Moodle 2.4.7 by Jody Steele
commit a10d621fc50e5fdceb5dec4df8dd04ba10387a55 Author: Jody Steele <steelej@queensu.ca> Date: Wed, 16 Oct 2013 23:19:34 +0800 Tag: v2.4.7 MDL-38628 mod_assign: Allow a user to specify "No Grade" when grading an assignment submission