GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
https://gitweb.torproject.org/community/training.git/plain/2019/tor-network/tor-network.odp
https://gitlab.torproject.org/tpo/web/community/-/blob/staging/content/training/resources/tor-training/contents.lr
