Author: Sun Zhigang
MDL-31201 wiki: fix a hardcoded string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c27a49324e698804f5ac8c8d8406ec0276c32a5b
http://github.com/moodle/moodle/commit/c27a49324e698804f5ac8c8d8406ec0276c32a5b
+ 2.1 en [tableofcontents,mod_wiki]