Change Details

When landing a range of commits with `arc land` and the `squash` strategy, the resulting commit should contain all co-authors. The co-authors would preferably determine based on all commits of the revision which have not been authored by the author of the revision. If any of the commits contains co-author information, that should be included as well.

When landing a range of commits with `arc land` and the `squash` strategy, the resulting commit should contain all co-authors. The co-authors would preferably be determined based on all commits of the revision which have not been authored by the author of the revision. If any of the commits contains co-author information, that should be included as well.

When landing a range of commits with `arc land` and the `squash` strategy, the resulting commit should contain all co-authors. The co-authors would preferably be determined based on all commits of the revision which have not been authored by the author of the revision. If any of the commits contains co-author information, that should be included as well.