'Remember a line number drawable to paint later.'

def _draw_linenumber(self, posno, lineno):

    self._draw_text(self._get_linenumber_pos(posno), str(lineno).rjust(self.line_number_chars), font=self.fonts.get_font(self.line_number_bold, self.line_number_italic), fill=self.line_number_fg)
