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 Everywhere seems to assume that all sites under *.senate.gov support HTTPS. However, at least some senators' sites do not.
http://www.alexander.senate.gov vs https://www.alexander.senate.gov