Preview of links not handling [[...|]] markup

[rlaemmel]

Please go here, for example:

http://101companies.org/wiki/Course:Programming%20in%20Koblenz

Then hover over the link for the AOP lecture.

Then observe how it shows some markup rather than the basic text only.

[rlaemmel]

This should have been on 101wiki.
Can we keep it here?

[tschmorleiz]

What I do for these headline is use @martinleinberger's discovery service. It effectively gives me pretty-printed headlines :) @martinleinberger, can you please handle this case? Say empty string after "|" in links.