mod log {    use git_repository as git;     #[test]    fn message() {        let mut commit = git::objs::Commit {            tree: git::hash::ObjectId::empty_tree(git_hash::Kind::Sha1),            parents: Default::default(),            author: Default::default(),            committer: Default::default(),            encoding: None,            message: "the subject\n\nthe body".into(),            extra_headers: vec![],        };        assert_eq!(            git::reference::log::message("commit", &commit),            "commit (initial): the subject"        );        commit.parents.push(git::hash::ObjectId::null_sha1());        assert_eq!(git::reference::log::message("other", &commit), "other: the subject");         commit.parents.push(git::hash::ObjectId::null_sha1());        assert_eq!(            git::reference::log::message("rebase", &commit),            "rebase (merge): the subject"        );    }}