[("tests/examples/Lambda6.hs:1:1-17: Warning: Eta reduce\nFound:\n fun x y z = f g z\nPerhaps:\n fun x y = f g\n",[Replace {rtype = Decl, pos = SrcSpan {startLine = 1, startCol = 1, endLine = 1, endCol = 18}, subts = [("body",SrcSpan {startLine = 1, startCol = 13, endLine = 1, endCol = 16}),("a",SrcSpan {startLine = 1, startCol = 5, endLine = 1, endCol = 6}),("b",SrcSpan {startLine = 1, startCol = 7, endLine = 1, endCol = 8})], orig = "fun a b = body"}])]