code: def config_section(self):
          
          names = []
          cmd = self
          while cmd.parent:
              names.append(cmd.name)
              cmd = cmd.parent
          if not names:
              return self.name
          else:
              return ' '.join(reversed(names))
docs: The string used in a .<ROOT>_config file section.  Usually this
          is just the full prog name for a command minus the root command.