split: pass GNU tests/b-chunk.sh (#5475)

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Co-authored-by: Terts Diepraam <[email protected]>
Co-authored-by: Daniel Hofstetter <[email protected]>
Co-authored-by: Brandon Elam Barker <[email protected]>
Co-authored-by: Kostiantyn Hryshchuk <[email protected]>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>