Git commits in Moodle 3.6.7 by Tim Schroeder

commit 864cd2743876ff2175d8619bc5455a5345c56396
Author: Tim Schroeder <t.schroeder@itc.rwth-aachen.de>
Date:   Mon, 23 Sep 2019 19:29:39 +0800
Tag:    v3.6.7

MDL-66542 lib: Fix quote escaping in JS quote helper