Cop: Avoid comma after the last item of a hash.
Cop: Indent the right brace the same as the start

of the line where the left brace is.
Cop: Space found before comma and missing after.
Cop: File.exists? is deprecated in favor of File.exist?.
Cop: Align the parameters of a method call

If they span more than one line.

Even though, it actually does not appeal to my aesthetics.
Cop: Avoid using {...} for multi-line blocks.