new_contents: def last_n(n, query_set):
      """Get the last n results from a Django QuerySet, in a semi-efficient way.
         Returns a list."""
  
      # We don't use reversed() because we would get a generator,
      # which causes bool(last_n(...)) to be True always.
  
      xs = list(query_set.reverse()[:n])
      xs.reverse()
      return xs
  
subject: Add a Django query helper