Author: Dan Poltawski
MDL-32286 - fix ambigious english string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1bcd3da0de7b760ce386d35ac3b8ef3a80135bc2
http://github.com/moodle/moodle/commit/1bcd3da0de7b760ce386d35ac3b8ef3a80135bc2
+ 2.2 en [uploadextension,core]