I noticed this at wikipedia with MediaWiki:Uploadtext & Special:Upload but other
Special pages may be affected too.
When i set at the message <nowiki>{{template}}</nowiki>, (showing ok at the
normal rendering) the special page renders it as _including_ it and then
treating it as nowiki, instead of nowikiing the template name.
Thus the internal template code was shown on the page, including tags as
<noinclude> and <includeonly>.
This can be workarounded using <nowiki>{{</nowiki>template<nowiki>}}</nowiki>.
Version: unspecified
Severity: major