code: def indicate_last(items):
      
      last_index = len(items) - 1
      for (i, item) in enumerate(items):
          yield (i == last_index, item)
docs: iterate through list and indicate which item is the last, intended to
      assist tree displays of hierarchical content.
  
      :return: yielding (<bool>, <item>) where bool is True only on last entry
      :rtype: generator