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--output-delimiter="" apparently means use the NUL character[1]. [1] https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=0e46753d7c9519d7378cd3a4e0951a36ac32ffe7
6e59a690
--output-delimiter="" apparently means use the NUL character[1]. [1] https://git.savannah.gnu.org/cgit/coreutils.git/commit/?id=0e46753d7c9519d7378cd3a4e0951a36ac32ffe7