Return type annotation is collapsed when no name is given #659

When parsing documentation docstrings, not specifying the returned variable name with multiple return types (ie. float or None or float | None), induces that the rendered documentation is removing all spaces between annotations.

See the example below taken from pyvista where we use the numpydoc sphinx extension https://docs.pyvista.org/api/utilities/_autosummary/pyvista.get_array.html#pyvista.get_array

This led us to add return parameter name all over the place as a workaround in pyvista/pyvista#8081, thereby excluding RT02 rule.

Is there another workaround ? Is this a parsing bug ?

Thanks in advance.