Developer credits
Git commits in Moodle 2.8.9 by Jakob
commit 57d281f55437918d2d1b9226f3826446bb014682 Author: Jakob <jackermann@onlineschool.ca> Date: Wed, 04 Nov 2015 02:41:03 +0800 Tag: v2.8.9 MDL-51899 mod/assign: Allow 0.00 grades while editing a grade.