Bad parsing on text with tspan

[EArminjon2]

Got following : But expected that :

<svg width="185" height="43" viewBox="0 0 185 43" xmlns="http://www.w3.org/2000/svg">
    <g fill="none" fill-rule="evenodd">
        <text x="35.081" y="15" font-family="OpenSans-Italic, Open Sans" font-size="14" font-style="italic" fill="#333">
            π( D² - d² )( N - N
            <tspan y="15" font-size="10">u</tspan>
            )
        </text>
    </g>
</svg>

SVG standard : https://developer.mozilla.org/fr/docs/Web/SVG/Element/tspan

[ghost]

Temporary fix on my side.... : (ugly)

<svg width="185" height="43" viewBox="0 0 185 43" xmlns="http://www.w3.org/2000/svg">
    <g fill="none" fill-rule="evenodd">
        <text x="35.081" y="15" font-family="OpenSans-Italic, Open Sans" font-size="14" font-style="italic" fill="#333">
            π( D² - d² )( N - N
            <tspan y="15" font-size="10">u
                <tspan y="15" font-size="14">)</tspan>
            </tspan>
        </text>
    </g>
</svg>

[dnfield]

I started cleaning up text a few days ago and think I can address this now.