I think they just implemented it badly. I have seen a similar thing in Typography.js [1] recently and probably because of Baader-Meinhof phenomenon, I saw it mu

I think they just implemented it badly. I have seen a similar thing in Typography.js [1] recently and probably because of Baader-Meinhof phenomenon, I saw it multiple times afterwards and just assumed that was now the default way to render underline. Try the Doelger theme at Typography.js, it looks pretty good actually. [1] https://kyleamathews.github.io/typography.js/ https://kyleamathews.github.io/typography.js/