Author: Tim Hunt
MDL-41248 completion: fix non-translatable text.
There were two hard-coded strings. Thanks to Guido Hornig for the suggested fix.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=379a3fcee3ee228e2bf32c428d2fc3a93631ea81
http://github.com/moodle/moodle/commit/379a3fcee3ee228e2bf32c428d2fc3a93631ea81
+ 2.6 en [daysoftotal,core_completion]