// the image to have panning capabilities when viewed in a browser.
func massageDotSVG() PostProcessor {
	generateSVG := invokeDot("svg")
	return func(input io.Reader, output io.Writer, ui plugin.UI) error {
		baseSVG := new(bytes.Buffer)
		if err := generateSVG(input, baseSVG, ui); err != nil {
			return err
		}
		_, err := output.Write([]byte(massageSVG(baseSVG.String())))
		return err
	}
}