Author: Tim Hunt
MDL-63403 filter_glossary: Fix lang string concatenation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=366a85cbb4fcf1fdd9fbf98bf8b0c208ff5160e0
http://github.com/moodle/moodle/commit/366a85cbb4fcf1fdd9fbf98bf8b0c208ff5160e0
+ 3.5 en [glossarycategory,filter_glossary]
+ 3.5 en [glossaryconcept,filter_glossary]