bug#57400: 29.0.50; Support sending patches from VC directly

[Philip Kaludercic]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Philip Kaludercic <philipk@posteo.net>
>> Cc: juri@linkov.net,  rpluim@gmail.com,  57400@debbugs.gnu.org,  ane@iki.fi
>> Date: Sat, 15 Oct 2022 11:44:58 +0000
>> 
>> The function does accept everything that "git name-rev" accepts, after
>> all it just passes commit to the subcommand.  What FORCE does is
>> restrict what "git name-rev" response is accepted to be returned by
>> `vc-git-symbolic-commit'.
>
> Ah, so this is what I was missing...
>
> Then how about
>
>    If the optional argument FORCE is non-nil, the returned value is
>    allowed to include revision specifications like \"master~8\"
>    (the 8th parent of the commit currently pointed to by the master
>    branch), otherwise such revision specifications are rejected, and
>    the function returns nil.

Sounds good to me.