Git commits in Moodle 4.0.0 by Matt Clarkson

commit 728e8c4a3cdf67088182d21db52e80ce18acd29b
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Wed, 08 Sep 2021 10:38:34 +0800
Tag:    v4.0.0-beta

MDL-72527 core: Fix behat unit test failure


commit 541e90c32c266cd7b771e9c950eaae8927c3409b
Author: Matt Clarkson <mattc@catalyst.net.nz>
Date:   Fri, 23 Oct 2020 11:06:36 +0800
Tag:    v4.0.0-beta

MDL-68722 atto_equation: fix for form elements with special characters