Parse error on forall

[NeilMitchell]

As reported by an HLint user in http://code.google.com/p/ndmitchell/issues/detail?id=504, HSE can't deal with the \forall symbol. The following gives a parse error.

{-# LANGUAGE UnicodeSyntax, ExplicitForAll #-}

module UniTest2 where

id1 ∷ ∀ a . a → a
id1 x = x