      class BookReview(Book, Article):
          pass
  
  Field name "hiding" is not permitted
  -------------------------------------
  
  In normal Python class inheritance, it is permissible for a child class to
  override any attribute from the parent class. In Django, this isn't usually
  permitted for model fields. If a non-abstract model base class has a field
  called ``author``, you can't create another model field or define
 
</s> remove -------------------
 </s> add --------------- </s> remove -------------------
 </s> add ---------------- </s> remove ------------------------------------
 </s> add ----------------------------------- </s> remove -------------------
 </s> add -------------- </s> remove ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 </s> add ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
------------------------------------
      class BookReview(Book, Article):
          pass
  
  Field name "hiding" is not permitted
------------------------------------
  
  In normal Python class inheritance, it is permissible for a child class to
  override any attribute from the parent class. In Django, this isn't usually
  permitted for model fields. If a non-abstract model base class has a field
  called ``author``, you can't create another model field or define
keep keep keep keep replace keep keep keep keep keep
 Removed extra characters in docs header underlines. 
docs/topics/db/models.txt