Git commits in Moodle 3.8.x by Bence Molnar

commit 3427a6ec76e2f5996e5815adacd15920a87e5c1b
Author: Bence Molnar <epititk@epito.bme.hu>
Date:   Tue, 19 May 2020 04:04:36 +0800
Tag:    v3.8.4

MDL-68733 quiz editing: be more careful deleting random question tags