Git commits in Moodle 3.11.4 by Odei Alba

commit 12092057668dcaffdd3398f0dce5c42cc0c2aec0
Author: Odei Alba <odeialba@gmail.com>
Date:   Thu, 19 Aug 2021 23:24:14 +0800
Tag:    v3.11.4

MDL-68325 completion: Add validation to course completion form