Function undo_events

pub fn undo_events(
    in_: &mut impl Read,
    effects: &Effects,
    repo: &Repo,
    git_run_info: &GitRunInfo,
    event_log_db: &mut EventLogDb<'_>,
    event_replayer: &EventReplayer,
    event_cursor: EventCursor,
) -> EyreExitOr<()>