Author: Andrew Davis
MDL-44756 editor_atto: changed a string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=13f432976a95c1bb700802affaa676e2cf1e1499
http://github.com/moodle/moodle/commit/13f432976a95c1bb700802affaa676e2cf1e1499
+ 2.7 en [showgroups,atto_collapse]