  
        In the above example, the methods below will be available on
        the manager ``blog.entry_set``.
  
      * Both sides of a :class:`~django.db.models.ManyToManyField` relation::
  
              class Topping(models.Model):
                  # ...
                  pass
  
 
</s> remove     Company.objects.filter(num_employees__gt=F('num_chairs') * 2)
    Company.objects.filter(
        num_employees__gt=F('num_chairs') + F('num_chairs'))
 </s> add     >>> Company.objects.filter(num_employees__gt=F('num_chairs') * 2)
    >>> Company.objects.filter(
    ...     num_employees__gt=F('num_chairs') + F('num_chairs')) </s> remove in model ``Bar``, instead of using the model name ``bar`` as the lookup::
 </s> add in model ``Bar``, instead of using the model name ``bar`` as the lookup:

.. code-block:: pycon </s> remove         # ...
 </s> add         ... </s> remove             # ...
 </s> add             ...
    * Both sides of a :class:`~django.db.models.ManyToManyField` relation
      ::
  
        In the above example, the methods below will be available on
        the manager ``blog.entry_set``.
  
    * Both sides of a :class:`~django.db.models.ManyToManyField` relation
      ::
  
              class Topping(models.Model):
                  # ...
                  pass
  
keep keep keep keep replace keep keep keep keep keep
 Refs #34140 -- Corrected rst code-block and various formatting issues in docs. 
docs/ref/models/relations.txt