Corrected the `instance_dict` description for form wizards.

django/contrib/formtools/wizard/views.py

@@ -133,8 +133,9 @@ class WizardView(TemplateView):
           The key should be equal to the `step_name` in the `form_list` (or
           the str of the zero based counter - if no step_names added in the
           `form_list`)
-        * `instance_dict` - contains a dictionary of instance objects. This
-          is only used when `ModelForm`s are used. The key should be equal to
+        * `instance_dict` - contains a dictionary whose values are model
+          instances if the step is based on a ``ModelForm`` and querysets if
+          the step is based on a ``ModelFormSet``. The key should be equal to
           the `step_name` in the `form_list`. Same rules as for `initial_dict`
           apply.
         * `condition_dict` - contains a dictionary of boolean values or

docs/ref/contrib/formtools/form-wizard.txt

@@ -554,9 +554,8 @@ How to work with ModelForm and ModelFormSet
 WizardView supports :doc:`ModelForms </topics/forms/modelforms>` and
 :ref:`ModelFormSets <model-formsets>`. Additionally to
 :attr:`~WizardView.initial_dict`, the :meth:`~WizardView.as_view` method takes
-an ``instance_dict`` argument that should contain instances of ``ModelForm`` and
-``ModelFormSet``.  Similarly to :attr:`~WizardView.initial_dict`, these
-dictionary key values should be equal to the step number in the form list.
+an ``instance_dict`` argument that should contain model instances for steps
+based on ``ModelForm`` and querysets for steps based on ``ModelFormSet``.
 
 Usage of ``NamedUrlWizardView``
 ===============================