After python3 transition, webkitbot cannot revert multiple revisions.
1. webkitbot can parse multiple revisions as requested
2. it was working until recently, at least, until Sep 26.
So, this is likely a regression in webkit-patch command, which can be caused by python3 transition.
It seems that "reason" handling is also broken.
Now only the first word is used for the reverting reason.
Jonathan corrected this in https://commits.webkit.org/248021@main.