format_config_options: output in referenceable format
format_config_options: output in referenceable format

This uses the

.. option:: Name

directive, which can be linked to elsewhere via :option:`Name`.

Described here:
http://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#directive-option

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3