bug#52172: Fix vc-git--program-version to support Git for macOS version string

[Lars Ingebrigtsen]

Justin Schell <justinmschell@gmail.com> writes:

> `topic.fix-vc-git--program-version.ignore-trailing.patch` updates the
> regexp used to match numeric version strings that are a combination of
> digits and dots (starting with a digit), ignoring anything else that
> comes after. Any trailing dots are then stripped. This is more general
> than the current approach of supporting a numeric version string only,

I think this approach makes the most sense, but perhaps Dmitry has an
opinion here (added to the CCs).

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