[[Special:PrefixIndex]] should also contain class="mw-redirect" for redirects like [[Special:AllPages]].
Example:
https://www.mediawiki.org/w/index.php?title=Special:PrefixIndex&prefix=A
contains
<a title="AFT" href="/wiki/AFT">AFT</a>
https://www.mediawiki.org/w/index.php?title=Special:AllPages&from=A
contains
<a title="AFT" class="mw-redirect" href="/wiki/AFT">AFT</a>
Version: 1.20.x
Severity: enhancement