The workflow is now:
$ pw branch NNN
To create a branch with patch numb er NNN
$ git commit --amend
To check and modify the commit message where necessary
$ pw merge -m "Comment for notification email" NNN
To merge that branch. The -m comment will be added to the
notification email that is sent to the mailing list.
The -m comment can also be given to the update command,if the update
sends an email:
$ pw update -s "changes requested" -m "comment for email" NNN