Git commits in Moodle 3.8.3 by Jonathon Fowler

commit 06c3a4cc55b8e54b7ec46a5b7fc134d1c15d775e
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Tue, 03 Dec 2019 13:20:40 +0800
Tag:    v3.8.3

MDL-67442 assign: expand/contract text works in all browsers now