Git commits in Moodle 3.8.3 by Ruslan Kabalin

commit 13413304ef3c9ef1bd84209453875ba967e94ffa
Author: Ruslan Kabalin <ruslan.kabalin@gmail.com>
Date:   Thu, 02 Apr 2020 21:11:37 +0800
Tag:    v3.8.3

MDL-68315 formslib: Fix completion attribute in course form element.