Why does sphinx not document module level variables

[Iwan Aucamp]

RDFLib has a docstring for rdflib.NORMALIZE_LITERALS, and we use autodoc which generates the following for the rdflib module:

Module contents

---------------

.. automodule:: rdflib

:members:

:undoc-members:

:show-inheritance:

As far as I understand, the persence of `:members:` should result in some documentation for rdflib.NORMALIZE_LITERALS, however, there is no documentation being generated for it as far as I can tell. If it were generated, I would expect to see it here.

What is going wrong here? Is there some way I can get documentation to be generated for module level variables?