Tests

Using the .. graphviz:: directive

digraph foo {
   "bar" -> "baz";
}

Using the .. inheritance-diagram:: directive

.. inheritance-diagram::
  lino.modlib.contacts.models.Contact  dsbe.models.Contact
  lino.modlib.contacts.models.Person   dsbe.models.Person
  lino.modlib.contacts.models.Company  dsbe.models.Company