1 When combining multiple `--contains` and `--no-contains` filters, only
2 references that contain at least one of the `--contains` commits and
3 contain none of the `--no-contains` commits are shown.
5 When combining multiple `--merged` and `--no-merged` filters, only
6 references that are reachable from at least one of the `--merged`
7 commits and from none of the `--no-merged` commits are shown.