Git commits in Moodle 3.11.1 by David Mudrák

commit 9dc8ec17b91cfddc32ff755f9d8ceeb0af8d5777
Author: David Mudrák <david@moodle.com>
Date:   Thu, 01 Jul 2021 20:14:01 +0800
Tag:    v3.11.1

MDL-72063 lang: Use fixed strings in tests, too

commit 3d2b2042835d4131ac0a6a34288df5da54d5088c
Author: David Mudrák <david@moodle.com>
Date:   Wed, 19 May 2021 00:58:53 +0800
Tag:    v3.11.1

MDL-71659 completion: Consider modules without grade_item incomplete