bug#59414: 29.0.50; Have vc-git-expanded-log-entry pass --stat

[Sean Whitton <spwhitton@spwhitton.name>]

Hello,

On Sun 20 Nov 2022 at 02:58PM -07, Sean Whitton wrote:

> We already have vc-git-log-switches.  git-log(1) gets called *without*
> it in (at least) the following places:
>
> - vc-git-log-outgoing
> - vc-git-log-incoming
> - vc-git-log-search
> - vc-git-expanded-log-entry
> - vc-git-region-history
>
> I guess that the first three should probably use vc-git-log-switches if
> anything?  And so we would want a separate option for
> vc-git-expanded-log-entry.  Not sure about vc-git-region-history.

I think that we actually need two defcustoms for the regular logs and
shortlogs:

- vc-git-print-log -- should choose which defcustom to include based on
                      its SHORTLOG parameter
- vc-git-log-outgoing -- vc-git-shortlog-switches
- vc-git-log-incoming -- vc-git-shortlog-switches
- vc-git-log-search -- vc-git-log-switches
- vc-git-expanded-log-entry -- vc-git-log-switches

This is because some options are incompatible with shortlogs, such as
--stat.  So, the proposed change is to add the new defcustom, change
vc-git-print-log to use both defcustoms, and change all the other
functions to use one of them.  How does    this sound?

-- 
Sean Whitton