Author: Helen Foster
MDL-36236 caching: improved help string
(and Dan keeping codechecker happy)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=946f83b04b21544702f660a5030671082fb7f76a
http://github.com/moodle/moodle/commit/946f83b04b21544702f660a5030671082fb7f76a
+ 2.9 en [locking_help,core_cache]