Fixed a typo in a modelforms docs example.

docs/topics/forms/modelforms.txt

@@ -1023,7 +1023,7 @@ formset::
                 # Do something.
         else:
             formset = AuthorFormSet(queryset=Author.objects.filter(name__startswith='O'))
-        return render(request, 'manage_authors.html", {'formset': formset})
+        return render(request, 'manage_authors.html', {'formset': formset})
 
 Note that we pass the ``queryset`` argument in both the ``POST`` and ``GET``
 cases in this example.