ormolu/data/examples/declaration/deriving/multiline-out.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