True. To be fair, I noted this limitation in the example, and said that if the nesting structure is important, you should use a tool that can handle context-fr

True. To be fair, I noted this limitation in the example, and said that if the nesting structure is important, you should use a tool that can handle context-free languages. My more general warning was that if you find yourself exploiting the Turing-completeness of sed, you're using the wrong tool.