docs: def fullscreen(self):
          ''' Context Manager that enters full-screen mode and restores normal
              mode on exit.
  
              ::
  
                  with screen.fullscreen():
                      print('Hello, world!')
          '''
          stream = self._stream
          stream.write(self.alt_screen_enable)
          stream.write(str(self.save_title(0)))     # 0 = both icon, title
          stream.flush()
          try:
              yield self
          finally:
              stream.write(self.alt_screen_disable)
              stream.write(str(self.restore_title(0)))  # 0 = icon & title
              stream.flush()