Author: Simey Lameze
MDL-72045 calendar: change export doc link by help text
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f3176e8ec55ca158fd4efb7dad02fdde38bad4e9
http://github.com/moodle/moodle/commit/f3176e8ec55ca158fd4efb7dad02fdde38bad4e9
+ 4.0 en [exporthelp,core_calendar]