[("tests/examples/Extensions19.hs:1:1-63: Warning: Unused LANGUAGE pragma\nFound:\n {-# LANGUAGE GeneralizedNewtypeDeriving, DeriveDataTypeable #-}\nPerhaps:\n {-# LANGUAGE GeneralizedNewtypeDeriving #-}\nNote: Extension DeriveDataTypeable is not used\n",[ModifyComment {pos = SrcSpan {startLine = 1, startCol = 1, endLine = 1, endCol = 64}, newComment = "{-# LANGUAGE GeneralizedNewtypeDeriving #-}"}])]