how to reproduce
- create a new diff as user1
- add 2 reviewers: user2 and user3
- user2 accepts the revision
- user1 merges the diff with "arc land"
git log" shows "Reviewed by: user2, user3"
user3 did not agree to the patch and maybe even has concerns
do not add users to reviewed by if they haven't accepted the revision or add a "(unaccepted)" hint after the username.