error building pulpcore docs

(pulp) [vagrant@pulp3-source-fedora29 docs]$ make html
curl -o api.yaml "http://localhost:8000/pulp/api/v3/docs/api.yaml"
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 60575  100 60575    0     0  1690k      0 --:--:-- --:--:-- --:--:-- 1690k
sphinx-build -b html -d _build/doctrees  -W   . _build/html
Running Sphinx v1.7.9
/usr/local/lib/pulp/lib64/python3.7/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.
  """)
loading pickled environment... not yet created
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 57 source files that are out of date
updating environment: 57 added, 0 changed, 0 removed
reading sources... [100%] workflows/upload-publish

Warning, treated as error:
/home/vagrant/devel/pulpcore/pulpcore/app/serializers/repository.py:docstring of pulpcore.app.serializers.repository.RepositoryVersionSerializer.get_content_summary:8:Block quote ends without a blank line; unexpected unindent.
make: *** [Makefile:54: html] Error 2