when accessing a repo via the web the initial web view is fine. On that page at the end there is the text.
This page is only a quick source view for subversion. The full source view is here. Commits Source
containing three links. For all of these three links the URL starts with http and not https as it should be (the browsing of the files uses https correctly). Manually adding https after a 404 gives back the correct screen and lets you browse. It is just the entry screen that seems to be wrong.
We get a 404 because we are behind an apache2 reverse proxy and only forward (thus restricting to) https.