Expand gix-date baseline tests and implement missing Git date formats#2272

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Copilot wants to merge 11 commits intomainfrom

copilot/add-gix-date-baseline-tests

Commits on Nov 25, 2025

Initial plan
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Add comprehensive gix-date baseline tests with relative date support

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Byron
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Improve documentation for is_relative_date function

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Regenerate baseline tar archive to fix CI

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Add date parsing tests from Git's t0006-date.sh test suite

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Regenerate baseline tar archive for CI compatibility

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Add support for Git's flexible date formats (ISO8601 dots, compact ISO8601, Z suffix, flexible offsets)

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Fix clippy warnings and fuzz-discovered panics in date parsing

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Fix formatting issues in date parsing code

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Commits on Nov 26, 2025