Fix package header
Add vc-jj package definition
Implement vc-jj-working-revision
Also provide vc-jujutsushi
. This buys us project.el support try the 'vc'
project type.
Until the time when vc-jj.el is ready for being included upstream, we need to teach project.el that how to detect jujutsu projects using the #'try-vc strategy.
(add-to-list 'project-vc-backend-markers-alist '(jj . ".jj"))
(use-package project
:custom (project-vc-extra-root-markers '(".jj"))