.arcconfig

copy: add option to unmark file as copied

To unmark a file as copied, the user currently has to do this:

  hg forget <dest>
  hg add <dest>

The new command simplifies that to:

  hg copy --forget <dest>

That's not a very big improvement, but I'm planning to also teach `hg
copy [--forget]` a `--at-rev` argument for marking/unmarking copies
after commit (usually with `--at-rev .`).

Differential Revision: https://phab.mercurial-scm.org/D8029

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "phabricator.uri": "https://phab.mercurial-scm.org/",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}