Git commits in Moodle 3.5.3 by David Monllao

commit 76528a767ecf6fed2c155c0825979d4898bc0da2
Author: David Monllao <davidm@moodle.com>
Date:   Tue, 23 Oct 2018 22:39:30 +0800
Tag:    v3.5.3

weekly release 3.5.2+