bug#57807: 29.0.50; Make vc-print-branch-log able to log multiple branches

[Sean Whitton]

Hello,

On Wed 14 Sep 2022 at 08:41PM +03, Eli Zaretskii wrote:

> I'm not sure I understand: how is this different from what "C-x v L"
> already produces?

Here's an example showing logging two branches "melete" and "erebus" in
a repo of mine:

    * 8d679018 (origin/erebus) sync from melete ~/doc on erebus
    * 44398919 use light-on-dark on erebus
    * 272fc7a6 manual DPMS on erebus since it means no sound
    * 22fc8f11 erebus wallpaper
    * 512eb187 erebus terminal font size
    | * 038c0a31 (HEAD -> melete, origin/melete) sync from erebus ~/doc on 
melete
    | * 8197e31e modus-vivendi on melete for erebus
    |/
    * c3f9d152 (origin/master, origin/HEAD, master) attempt to ensure [...]
    * 643b20f6 spw/maybe-scale-basic-faces: simplify checking fonts were found

>From this view one is able to see how erebus is 5 commits ahead of
master and melete is two (different) commits ahead of master.

-- 
Sean Whitton