Developer credits
Git commits in Moodle 3.4.0 by Henning Bostelmann
commit b2e76ba7d8420cdf0b790680690d647c6485694e Author: Henning Bostelmann <henning.bostelmann@york.ac.uk> Date: Tue, 25 Apr 2017 18:57:19 +0800 Tag: v3.4.0-beta MDL-57957 mod_assign: show feedback file in absence of grade item