Re: [PATCH v5] fast-(import|export): improve on commit signature output format

> A recent commit, d9cb0e6ff8 (fast-export, fast-import: add support for
> signed-commits, 2025-03-10), added support for signed commits to
> fast-export and fast-import.
> ...
> It could be even better to be able to import more than one signature
> on the SHA-1 object and on the SHA-256 object, but other parts of
> Git don't handle that well for now, so this is left for future
> improvements.
>
> Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
> Helped-by: Elijah Newren <newren@gmail.com>
> Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
> ---
>
> This v5 is similar in spirit to v4, especially the format of the
> "gpgsig ..." command didn't change, but there are a number of
> improvements:
>
>   - All the signatures are now exported. On the import side, still at
>     most one signature for SHA-1 and one for SHA-256 are imported (and
>     a warning is still emitted for additional signatures) though.
>
>   - The code makes sure each signature ends with a LF character. While
>     this is not mandatory, it is encouraged and makes the output more
>     human readable and 'grep'able.
>
>   - A test with both a SHA-1 and a SHA-256 signature on the same
>     commit has been added.
>
>   - Some tests check that either "sha1" or "sha256" is in the "gpgsig
>     ..."  command instead of matching "sha(1|256)".
>
>   - The format of the "gpgsig ..." command is better explained both in
>     the commit message and in the fast-import documentation.
>
>   - There are some typo fixes, lines wrapped, and a few other such
>     small changes.