Merge pull request #425 from Osmose/queryset_doc_typo

Fixed typo in queryset docs under update method.

docs/ref/models/querysets.txt

@@ -1624,7 +1624,7 @@ does not call any ``save()`` methods on your models, nor does it emit the
 :attr:`~django.db.models.signals.post_save` signals (which are a consequence of
 calling :meth:`Model.save() <~django.db.models.Model.save()>`). If you want to
 update a bunch of records for a model that has a custom
-:meth:`~django.db.models.Model.save()`` method, loop over them and call
+:meth:`~django.db.models.Model.save()` method, loop over them and call
 :meth:`~django.db.models.Model.save()`, like this::
 
     for e in Entry.objects.filter(pub_date__year=2010):