setup: fix incomplete implementation of Command...
setup: fix incomplete implementation of Command
`test-install.t` fails without the `get_outputs` method being implemented,
which is used when, `self.report` is `True`.
When
8d7eaff92f9c introduced this change, they probably ran `test-install.t`
without `HGTESTS_ALLOW_NETIO=1`, which does not trigger this codepath.
Differential Revision:
https://phab.mercurial-scm.org/D12482