Hi all, I have a question to Phab gurus about using arcanist. I created a git branch, hacked a bit and then submitted a review using `arc diff`. Then I make a few more commits and want to update my revision. Running `arc diff` opens up an editor where I can create a new revision. Obviously, that's not what I want so I follow the suggestion from the comment in the editor to use `--update`: # arc diff --update D202 Exception Can't parse an empty diff! (Run with --trace for a full exception trace.) That's not what I want either. I'm left with manually specifying the base commit: arc diff 1719c42 and that works. But that's not really convenient. Any ideas why neither `arc diff` nor `arc diff --update <rev>` don't work (I believe they should)? Janek