ormolu/data/examples/declaration/deriving/multiline.hs

deriving instance Eq
                    Foo

deriving stock instance
  Show
    Foo
deriving anyclass instance
  ToJSON
    Foo
deriving newtype instance
  Data
    Foo

deriving instance
  {-# OVERLAPPABLE #-}
    Ord
      Foo
deriving instance
  {-# OVERLAPPING #-}
    Num
      Foo
deriving instance
  {-# OVERLAPS #-}
    Read
      Foo
deriving instance
  {-# INCOHERENT #-}
    Show
      Foo

deriving via Foo
               Int
  instance Triple
             A
             B
             C