Git commits in Moodle 3.6.0 by Alex

commit a91437a3c175ced4e1fa4e5b03b1a23c908eece1
Author: Alex <awhitlat@msudenver.edu>
Date:   Tue, 17 Apr 2018 10:56:10 +0800
Tag:    v3.6.0-beta

MDL-57600 format: Fix spelling errors