Setup: Require docutils<0.17'

Docutils 0.17 changes some rendering of properties, until support is added we should probably pin to use an older version.

I may not be a bad idea to keep a pinned version in the theme to prevent this issue in the future.

setup.py

@@ -116,6 +116,7 @@ def run(self):
     },
     install_requires=[
         'sphinx'
+        'docutils<0.17', # https://github.com/sphinx-doc/sphinx/issues/9001
     ],
     tests_require=[
         'pytest',