Developer credits
Git commits in Moodle 3.9.x by Marcus Boon
commit f1f5ba36ad7893e3fcc98a54804e1dbd22c3bea8 Author: Marcus Boon <marcus@catalyst-au.net> Date: Thu, 09 Apr 2020 11:00:29 +0800 Tag: v3.9.0-beta MDL-68388 core_grades: Use MUC for grade letters