It's because of this element in one of the final sections [1]:

    <code>kstat.zfs.<pool>.misc.ddt_stats_<checksum></code>

Typesetting code on a narrow screen is tricky!

[1] https://despairlabs.com/blog/posts/2024-10-27-openzfs-dedup-...

Not on Firefox on Android it doesn't.

It does in chrome on android (1080 px wide screen, standard ppi & zoom levels) but not by enough that you see it on the main body text (scrolling just reveals more margin), so you might find it does for you too but not enough that you noticed.

As it is scrolling here, though inconsequentially, it might be bad on a smaller device with less screen and/or other ppi settings.