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Continue to Chatcreated utility "cvsgrep" from "rcsgrep" shipping with O'Reilly's "Unix Power Tools" (the code TAR ball) https://wp.jochen.hayek.name/blog-en/2013/10/23/created-utility-cvsgrep-from-rcsgrep-shipping-with-oreillys-unix-power-tools-the-code-tar-ball/