Re: [PATCH v5 3/4] commit test: test_set_editor in each test

Jeff King [off-list ref] writes:

[1] It might make sense for test_set_editor, when run from within a
    test, to behave more like test_config, and do:

      test_when_finished '
        sane_unset FAKE_EDITOR &&
        sane_unset EDITOR
      '

    I don't know if there would be fallouts with other test scripts,
    though.

The default environment for tests is to set EDITOR=: to avoid
accidentally triggering interactive cruft and interfering with
automated tests, I thought.

If the above sane-unset is changed to EDITOR=: then I think that is
probably sensible.