Author: Leon Stringer
MDL-71860 core: Migrate lang string
Corresponding move of language string invalidpersistenterror following
move of class invalid_persistent_exception in MDL-57273.
AMOS BEGIN
CPY [invalidpersistenterror,core_competencies],[invalidpersistenterror,core_error]
AMOS END
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2a785a209a52fac8dab3690c3b35edacf564e594
http://github.com/moodle/moodle/commit/2a785a209a52fac8dab3690c3b35edacf564e594
+ 3.10 en [invalidpersistenterror,core_error]