[Haskell-cafe] New type of ($) operator in GHC 8.0 is problematic

[Geraldus]

Hi, friends! I want to share my own feelings about type signatures. It is
always hard for me to read type signatures with class constraints, because
first I need to spot that there is =>, then I have to split type signature
in my mind to constraint part and actual signature part. I think having
constraints before signature when defining things is something that eases
source parsing and etc., but wouldn't type signatures become a bit more
readable if we put constraints after actual signature when printing it in
GHCi (and maybe in Haddock), e.g.:

($) :: (a -> b) -> a -> b
    forall r :: RuntimeRep
           a :: *
           b :: TYPE r
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