make hlint error output easier to read

[gilligan]

This is probably a won't fix but I wanted to get some feedback anyway: While the error format parsing of hlint output works just fine the errors can be very hard to read when put on a single line (Think of type errors where consecutive lines narrow down the error origin) I wonder if there is any way to have line breaks in a single location list entry or any other way to improve the readability ?

[schickling]

:+1:

[rubik]

I'd love multiline output for HLint as well! :+1: