Developer credits
Git merges in Moodle 3.1.9 by Andrew Nicols
commit 853fbda447469ed61d9c6ad9b455ecbb41b4d3a8 Author: Andrew Nicols <andrew@nicols.co.uk> Date: Thu, 26 Oct 2017 14:35:45 +0800 Tag: v3.1.9 Merge branch 'wip-MDL-60543-31' of git://github.com/marinaglancy/moodle into MOODLE_31_STABLE