code: def _remove_trailing_empty_p(self):
          
          block_items = list(self.iter_block_items())
          last_content_elm = block_items[-1]
          if last_content_elm.tag != qn('w:p'):
              return
          p = last_content_elm
          if len(p.r_lst) > 0:
              return
          self.remove(p)
docs: Remove the last content element from this cell if it is an empty
          ``<w:p>`` element.