class RDoc::Markdown

def _Ticks4
  _save = self.pos
  while true # sequence
    _tmp = match_string("````")
    unless _tmp
      self.pos = _save
      break
    end
    _save1 = self.pos
    _tmp = match_string("`")
    _tmp = _tmp ? nil : true
    self.pos = _save1
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence
  set_failed_rule :_Ticks4 unless _tmp
  return _tmp
end