splitTyConApp_maybe _ = Nothing
newTyConInstRhs :: TyCon -> [Type] -> Type
--- ^ Unwrap one 'layer' of newtype on a type constructor and it's arguments, using an
+-- ^ Unwrap one 'layer' of newtype on a type constructor and its arguments, using an
-- eta-reduced version of the @newtype@ if possible
newTyConInstRhs tycon tys
= ASSERT2( equalLength tvs tys1, ppr tycon $$ ppr tys $$ ppr tvs )