I noticed this behaviour in someone else's edit. It appears that they had
habitually wikified a term despite the fact that they were including it as
the text of an external link. I realise this shouldn't be supported, but the
behaviour that it exhibits should probably be considered as not "doing the
right thing".
What it does is hard to explain, so here's a diff to a WP:Sandbox edit
demonstrating it:
This doesn't really break anything or pose any security issues (that I can
think of), but the code handling wikitext rendering should probably not try
to wikify double-square-bracket-delineated text in external links anyway.
Kynnin Scott
http://en.wikipedia.org/w/index.php?title=Wikipedia%3ASandbox&diff=1198…
oldid=11983377