Corrected the instance_dict description for form wizards.

Author: apollo13

django/contrib/formtools/wizard/views.py

@@ -133,8 +133,9 @@ def get_initkwargs(cls, form_list, initial_dict=None,
  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``
 ===============================