Author: Dan Poltawski
MDL-33624 lang - remove incosistent use of placeholder
http://git.moodle.org/gw?p=moodle.git;a=commit;h=19a8646822ac65eb8d71a8302b769522927eb8a1
http://github.com/moodle/moodle/commit/19a8646822ac65eb8d71a8302b769522927eb8a1
+ 2.4 en [invalidcourseid,core_error]
- 2.4 en [invalidcourseid,core_notes]