Problem
The documentation ("doc") repository has been converted to git but
arcanist does not yet understand how to interact with phabricator in
this world.
Solution
- remove the callsign "D" which should be inferable from having one of
the cgit URLs as a remote
- remove "history.immutable" which was a workflow only required for
subversion
Problem
When using git-svn or other non-pure-svn tooling the original subversion
URL is not present. This causes arcanist/phabricator to be unable to
determine which repository is being modified.
Solution
Restore callsign to .arcconfig to enable exact repository matching even
with git-svn.
Reported By: jhb