Thread:Project:Support desk/How to make no follow link to pages where user may see the page code?/reply (6)

MediaWiki 1.20 is now an unsupported version. You should upgrade.

You are right. That was a bug. If you edit a page but don't have permissions, like in your installation for anonymous users, the  doesn't appear. This has been fixed since.

I've tested the same behavior on 1.23 and it doesn't happen.