[("tests/examples/Default98.hs:1:7-30: Warning: Redundant $!\nFound:\n return $! Just undefined\nPerhaps:\n return (Just undefined)\n",[Replace {rtype = Expr, pos = SrcSpan {startLine = 1, startCol = 7, endLine = 1, endCol = 31}, subts = [("f",SrcSpan {startLine = 1, startCol = 7, endLine = 1, endCol = 13}),("x",SrcSpan {startLine = 1, startCol = 17, endLine = 1, endCol = 31})], orig = "f (x)"}])]