Documented default value of InlineModelAdmin.extra.
@@ -2308,7 +2308,7 @@ The ``InlineModelAdmin`` class adds or customizes:
.. attribute:: InlineModelAdmin.extra
This controls the number of extra forms the formset will display in
- addition to the initial forms. See the
+ addition to the initial forms. Defaults to 3. See the
:doc:`formsets documentation </topics/forms/formsets>` for more
information.
