Git commits in Moodle 3.9.x by Sagar Ghimire

commit 2d462ee8bd90de217b8c65ffe5e76c09ced20ef2
Author: Sagar Ghimire <gmrsagar@gmail.com>
Date:   Mon, 24 Aug 2020 09:40:49 +0800
Tag:    v3.9.3

MDL-68284 gradebook: Prevent exposing hidden quiz grade item