Git commits in Moodle 3.9.0 by ferran.recio

commit 178be88e974967b1f42f6492370094adde2fbc4a
Author: ferran.recio <ferran.recio@upcnet.es>
Date:   Thu, 29 Aug 2019 22:23:41 +0800
Tag:    v3.9.0-beta

MDL-66332 tool_capability: adding acceptance tests

commit e96bbb53afdaa16650164809689a45ac35926b22
Author: ferran.recio <ferran.recio@upcnet.es>
Date:   Tue, 06 Aug 2019 22:34:45 +0800
Tag:    v3.9.0-beta

MDL-66332 too_capability: add show differences option