I have observed this behavior in the Chrome/Firefox extensions when using markup text:
[[errors here are ignord]][errors here are ignord](http://ignorederrorsexample.com)[errors here are NOT ignord]

It doesn’t make sense for me. What is the purpose?
A more useful approach would be:
[[errors here are NOT ignord]]-
[[errors here are ignord|errors here are NOT ignord]](for Wikipedia markup) [errors here are NOT ignord](http://ignorederrorsexample.com)[error here are NOT ignord]
What do you think?