Git commits in Moodle 3.3.x by Soon-Systems

commit 23ec9e80b4ca85914686eca343dc9355e9905337
Author: Soon-Systems <moodle-dev@soon-systems.de>
Date:   Tue, 07 Feb 2017 16:28:51 +0800
Tag:    v3.3.1

MDL-54887 calendar: Format summary + description of an event for export