fix: disallow `hg fix --all --working-dir`
`--all` implies `--working-dir`, so it's probably a mistake if the
user uses both.
Differential Revision: https://phab.mercurial-scm.org/D8284
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}