[("tests/examples/Structure19.hs:2:17: Error: Redundant bang pattern\nFound:\n  !(x : xs)\nWhy not:\n  (x : xs)\n",[Replace {rtype = Pattern, pos = SrcSpan {startLine = 2, startCol = 17, endLine = 2, endCol = 26}, subts = [("x",SrcSpan {startLine = 2, startCol = 18, endLine = 2, endCol = 26})], orig = "x"}])]