doc nit: slug_field not required
|Reported by:||CarlFK||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
seems "and slug_field" is not required given " By default, slug_field is 'slug'."
Either object_id or (slug and slug_field) is required.
If you provide object_id, it should be the value of the primary-key field for the object being displayed on this page.
Otherwise, slug should be the slug of the given object, and slug_field should be the name of the slug field in the QuerySet's model. By default, slug_field is 'slug'.