[("tests/examples/Default2.hs:1:7: Warning: Use map once\nFound:\n  map f (map g x)\nWhy not:\n  map (f . g) x\n",[Replace {rtype = Expr, pos = SrcSpan {startLine = 1, startCol = 7, endLine = 1, endCol = 22}, subts = [("f",SrcSpan {startLine = 1, startCol = 11, endLine = 1, endCol = 12}),("g",SrcSpan {startLine = 1, startCol = 18, endLine = 1, endCol = 19}),("x",SrcSpan {startLine = 1, startCol = 20, endLine = 1, endCol = 21})], orig = "map (f . g) x"}])]