[("tests/examples/Lambda1.hs:1:1: Error: Redundant lambda\nFound:\n f a = \\ a -> a + a\nWhy not:\n f _ a = a + a\n",[Replace {rtype = Decl, pos = SrcSpan {startLine = 1, startCol = 1, endLine = 1, endCol = 18}, subts = [("body",SrcSpan {startLine = 1, startCol = 13, endLine = 1, endCol = 18}),("a",SrcSpan {startLine = 0, startCol = 0, endLine = 0, endCol = 0}),("b",SrcSpan {startLine = 1, startCol = 8, endLine = 1, endCol = 9})], orig = "f _ b = body"}])]