ArrApp arrow arg _ HsFirstOrderApp True)
  = hsep [ppr_lexpr arrow, larrowt, ppr_lexpr arg]
ppr_expr (H
ppr_expr (HsArrApp arrow arg _ HsFirstOrderApp True)
  = hsep [ppr_lexpr arrow, larrowt, ppr_lexpr arg]
ppr_expr (HsArrApp arrow arg _ HsFirstOrderApp True)
  = hsep [ppr_lexpr arrow, larrowt, ppr_lexpr arg]