bug#38343: 27.0.50; vc git: Cannot edit outgoing log (like git commit --amend)

[Dmitry Gutov]

On 26.11.2019 22:43, Fredrik Nyqvist wrote:
> Den mån 25 nov. 2019 kl 23:49 skrev Dmitry Gutov <dgutov@yandex.ru 
> <mailto:dgutov@yandex.ru>>:
>
>     On 25.11.2019 22:16, Fredrik Nyqvist wrote:
>      > Yes, I have tried the option you mention to edit the last commit
>     with
>      > C-x C-e and it is working fine.
>      > But It seems that it only allows amending the last commit if I have
>      > edited a file.
>
>     Yes. Not sure how to change an arbitrary commit in Git anyway (without
>     interactive rebase). The best approximation looks like this:
>
>     https://stackoverflow.com/a/48999882/615245
>
>
> I am not sure how to do it in a good way either. Maybe the option to 
> edit an
> older commit message could be skipped for vc-git. And then just allow amend
> on the latest one.

The question is how to skip. Error in the end, after the user has 
already written the new commit message?

Or add a backend predicate action, like "can edit revision ##". That's 
one more action, though.