Author: Helen Foster
MDL-72063 lang: Import fixed English strings (en_fix)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ab53075f227e433c8986be61201519a8c87d1534
http://github.com/moodle/moodle/commit/ab53075f227e433c8986be61201519a8c87d1534
+ 4.0 en [emptycmids,core]
+ 4.0 en [emptysectionids,core]
+ 4.0 en [unexistingcmid,core]
+ 4.0 en [unexistingsectionid,core]