Author: Tim Hunt
MDL-77729 qformat_missingword: fix form of help link
http://git.moodle.org/gw?p=moodle.git;a=commit;h=60220de680dfb38a926a7dbc158c1efc9dafeee1
http://github.com/moodle/moodle/commit/60220de680dfb38a926a7dbc158c1efc9dafeee1
+ 4.0 en [pluginname_link,qformat_missingword]