Author: Jun Pataleta
MDL-35971 mod_forum: Add proper discussion list table description
http://git.moodle.org/gw?p=moodle.git;a=commit;h=de2238985d929e7942c652aed2c8e705350c41a4
http://github.com/moodle/moodle/commit/de2238985d929e7942c652aed2c8e705350c41a4
+ 3.8 en [showingcountoftotaldiscussions,mod_forum]