I have recently edited this tag-info on MathOverflow.
Only now I have noticed that links are shown as bare urls:
On the other hand, when editing, the links are rendered as titles of the question in the preview.
Of course, I should have been more careful and notice this after checking the end result of my edit. (As you can see, I have made two revisions to that tag-wiki and still I somehow was able to miss this.)
Still it would be nice to have consistent behavior between preview and final result. (And it would be even nicer if the links would be rendered in tag-wikis as titles - the same way they are rendered in posts.)