Unable to parse `QuantifiedConstraints` syntax

[fabiomogavero]

GHC 8.6.1 introduced the new QuantifiedConstraints pragma, however, the latest stylish-haskell (ver 0.9.4.4) is unable to parse the associated class assertion syntax. For example, when applied on

class C (a :: *)
class (forall b . C (c b)) => D (c :: * -> *)

the program returns the following error message: Language.Haskell.Stylish.Parse.parseModule: could not parse : ParseFailed (SrcLoc ".hs" ... ...) "Illegal class assertion".

Thank you very much for your help.

[EncodePanda]

Downstream issue on haskell-src-ext haskell-suite/haskell-src-exts#433

Low-hanging-fruit once we get support (bump the version up).

[Matthiasvanderhallen]

This was fixed by ba5456a.