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tac: correct behavior of -b option (#2523)

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* tac: correct behavior of -b option

Correct the behavior of `tac -b` to match that of GNU coreutils
`tac`. Specifically, this changes `tac -b` to assume *leading* line
separators instead of the default *trailing* line separators.

Before this commit, the (incorrect) behavior was

    $ printf "/abc/def" | tac -b -s "/"
    def/abc/

After this commit, the behavior is

    $ printf "/abc/def" | tac -b -s "/"
    /def/abc

Fixes #2262.

* fixup! tac: correct behavior of -b option

* fixup! tac: correct behavior of -b option

Co-authored-by: Sylvestre Ledru <sylvestre@debian.org>
This commit is contained in:
jfinkels 2021-08-22 15:01:17 -04:00 • committed by GitHub
parent 114c9a409c
commit 4ef35d4a96
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3 changed files with 96 additions and 63 deletions
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tests/fixtures/tac/delimited_primes_before.expected vendored
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