Ticket #14791: clarify_save.diff

docs/topics/forms/modelforms.txt

@@ -241 +241 @@
     >>> f.save()
 
 Note that ``save()`` will raise a ``ValueError`` if the data in the form
-doesn't validate -- i.e., ``if form.errors``.
+doesn't validate -- i.e., if form.errors evaluates to True.
 
 This ``save()`` method accepts an optional ``commit`` keyword argument, which
 accepts either ``True`` or ``False``. If you call ``save()`` with