class RDoc::Markdown

def _OptionallyIndentedLine
  _save = self.pos
  while true # sequence
    _save1 = self.pos
    _tmp = apply(:_Indent)
    unless _tmp
      _tmp = true
      self.pos = _save1
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_Line)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence
  set_failed_rule :_OptionallyIndentedLine unless _tmp
  return _tmp
end