Author: Jun Pataleta
MDL-76942 core: Revert change to insertresourceoractivitybefore
Revert the lang string "Add an activity or resource before [xx]" back to
its original form of "Insert an activity or resource before [xx]" in
order to avoid conflicts with the "Add an activity or resource" button
especially when running Behat tests.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=544656431aa246181d1c9b545cae482fcc035107
http://github.com/moodle/moodle/commit/544656431aa246181d1c9b545cae482fcc035107
+ 4.2 en [insertresourceoractivitybefore,core]