Git commits in Moodle 3.5.1 by Alex

commit b104cede75ca20cc0ad163107258ebba28761c96
Author: Alex <awhitlat@msudenver.edu>
Date:   Tue, 17 Apr 2018 10:56:10 +0800
Tag:    v3.5.1

MDL-57600 format: Fix spelling errors