Write mathjax settings, set math fontsize

def set_mathjax_style(style_css, mathfontsize):
    """Write mathjax settings, set math fontsize
    """

    jax_style = """<script>
    MathJax.Hub.Config({
        "HTML-CSS": {
            /*preferredFont: "TeX",*/
            /*availableFonts: ["TeX", "STIX"],*/
            styles: {
                scale: %d,
                ".MathJax_Display": {
                    "font-size": %s,
                }
            }
        }
    });\n</script>
    """ % (int(mathfontsize), '"{}%"'.format(str(mathfontsize)))

    style_css += jax_style
    return style_css