$ arc shell $ arc diff -m "Rebased against master." (Message saved to commit message.) Usage Exception: You don't own revision D603 'Add quotes to command arguments'. You can only update revisions you own. You can 'Commandeer' this revision from the web interface if you want to become the owner.
That means two things:
- This is the genuine arcanist, not our version
- This isn't an up to date arcanist, as twentyfourafter and me worked on this issue some months ago