# File lib/rvg/pathdata.rb, line 83
        def curveto(abs, x1, y1, x2, y2, x, y, *coords)
            @path << sprintf("%s%g,%g %g,%g %g,%g ", (abs ? 'C' : 'c'), x1, y1, x2, y2, x, y)
            # "multiple sets of coordinates may be specified to draw a polybezier"
            add_points(6, *coords)
        end