Author: Sun Zhigang
MDL-31201 wiki: fix a hardcoded string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=713e6922e0e1b0d29d5c17bc009b007f76bd7f18
http://github.com/moodle/moodle/commit/713e6922e0e1b0d29d5c17bc009b007f76bd7f18
+ 2.2 en [tableofcontents,mod_wiki]