Author: Andrew Nicols
MDL-55767 competency: Deprecate langstring and replace
http://git.moodle.org/gw?p=moodle.git;a=commit;h=dbab30b12709a9080c676c8bbdd2d989394837e8
http://github.com/moodle/moodle/commit/dbab30b12709a9080c676c8bbdd2d989394837e8
+ 3.2 en [invalidpersistenterror,core_competency]
+ 3.2 en [invalidpersistent,core_competency]