cell(1).draw(pi, x + 8 + w0, y + 1);
pi.pain.rectangle(x + w0 + 6, y - dim_.ascent() + 3,
w1 + 4, dim_.height() - 6, Color::mathline);
cell(1).draw(pi, x + 8 + w0, y + 1);
pi.pain.rectangle(x + w0 + 6, y - dim_.ascent() + 3,
w1 + 4, dim_.height() - 6, Color::mathline);