Extensions18.hs.refact

[("tests/examples/Extensions18.hs:1:1-63: Warning: Unused LANGUAGE pragma\nFound:\n  {-# LANGUAGE GeneralizedNewtypeDeriving, DeriveDataTypeable #-}\nPerhaps:\n  {-# LANGUAGE DeriveDataTypeable #-}\nNote: Extension GeneralizedNewtypeDeriving is not used\n",[ModifyComment {pos = SrcSpan {startLine = 1, startCol = 1, endLine = 1, endCol = 64}, newComment = "{-# LANGUAGE DeriveDataTypeable #-}"}]),("tests/examples/Extensions18.hs:2:1-32: Suggestion: Use newtype instead of data\nFound:\n  data Foo\n    = Foo Int\n    deriving Data\nPerhaps:\n  newtype Foo\n    = Foo Int\n    deriving Data\nNote: decreases laziness\n",[])]