I'm using Prelude Emacs. I could've sworn there was a simple option to allow the error tooltip to use multiple lines instead of 1, but I can't find it and my error messages get cut off by the window's edge. It's very frustrating to have to go list all flycheck errors just to see if it's something that matters or not.
I have found nothing digging through github or google, but maybe It's simpler than that.