Git commits in Moodle 3.1.x by Matthew Switlik

commit 33b8704892b3cdc71793aa7f7e4228a50737b0cf
Author: Matthew Switlik <switlik@oakland.edu>
Date:   Fri, 14 Oct 2016 22:48:35 +0800
Tag:    v3.1.3

MDL-43796 assign: Reset revealidentities on restore