[("tests/examples/Dollar0.hs:1:16: Error: Use concatMap\nFound:\n  concat $ map f x\nWhy not:\n  concatMap f x\n",[Replace {rtype = Expr, pos = SrcSpan {startLine = 1, startCol = 16, endLine = 1, endCol = 32}, subts = [("f",SrcSpan {startLine = 1, startCol = 29, endLine = 1, endCol = 30}),("x",SrcSpan {startLine = 1, startCol = 31, endLine = 1, endCol = 32})], orig = "concatMap f x"}])]