code: def clear_screen(self):
          
  
          if self._term != 'xterm-256color':
              self.stdscr.touchwin()
          else:
              self.stdscr.clearok(True)
docs: In the beginning this always called touchwin(). However, a bug
          was discovered in tmux when TERM was set to `xterm-256color`, where
          only part of the screen got redrawn when scrolling. tmux automatically
          sets TERM to `screen-256color`, but many people choose to override
          this in their tmux.conf or .bashrc file which can cause issues.
          Using clearok() instead seems to fix the problem, with the trade off
          of slightly more expensive screen refreshes.
  
          Update: It was discovered that using clearok() introduced a
          separate bug for urxvt users in which their screen flashed when
          scrolling. Heuristics were added to make it work with as many
          configurations as possible. It's still not perfect
          (e.g. urxvt + xterm-256color) will screen flash, but it should
          work in all cases if the user sets their TERM correctly.
  
          Reference:
              https://github.com/michael-lazar/rtv/issues/343
              https://github.com/michael-lazar/rtv/issues/323