Sidebar Widge Overlap in IE Only

So I hired someone to do some work on my website but didn’t have the time to properly check that he had done everything right.

He added sidebar widget of resources with links. The problem is that in Internet Explorer the titles don’t fill the whole space. So it’ll go “long title here” and be displayed

“long
title
here”

Actually, the first one works fine, but the others don’t.

You can see it here: https://healthlifeandstuff.com/2010/03/the-12-most-surprising-medical-facts/

Would really appreciate any advice. I already paid the developer so feel bad about bothering him but this is a fairly big bug and since i know a little code should be able to fix myself…