Git commits in Moodle 3.6.4 by Dmitrii Metelkin

commit 0d493433d39dee24c242e47949862ef8453a32c2
Author: Dmitrii Metelkin <dmitriim@catalyst-au.net>
Date:   Wed, 20 Mar 2019 06:43:15 +0800
Tag:    v3.6.4

MDL-65112 mod_lesson: fix html for shortanswer responses