help_page_path(?) encoding #'s as %23

Just installed 8.9.0 for some testing and saw a new project setting relating to merge requests. There is a link to a help page which doesn't work as the url is being encoded so the # is ending up as %23.

https://gitlab.com/help/workflow/merge_requests%23only-allow-merge-requests-to-be-merged-if-the-build-succeeds

The code is line 11 at https://gitlab.com/gitlab-org/gitlab-ce/blame/master/app/views/projects/_merge_request_settings.html.haml but not sure if help_page_path needs to be fixed or something else.

This is reproducible on gitlab.com