Move to beginning of next stem

[45mg]

To switch branches, one needs to be on a stem root (branchpoint). Add a command to make it easier to move between stem roots (meant to be used along with vundo-stem-root).

I don't have FSF papers yet; let me know if you'd be willing to merge this and I'll look into it.

[casouri]

Thanks! Makes sense. Could you bind it to w instead? For me A is a bit unintuitive since a goes backward, then logically A should go even more backward rather than forward. w is a vim thing but...

[casouri]

If you have other ideas, I'm all ears ;-)

[45mg]

Changed it to w. Evil users will probably want to redo all the bindings around hjkl anyway.

I've sent a mail to emacs-devel.

[casouri]

Merged, thanks!

[casouri]

Also thanks for initializing on the copyright process. I hope this can be your first step to more awesome Emacs contribution!