Code Blocks Render As Single Line

[elsiehupp]

On vscodium.github.io, there is a code block that looks like this:

```bash
flatpak install flathub com.vscodium.codium

flatpak run com.vscodium.codium
```

And it renders like this:

I don't know a lot about Jekyll themes, but it seems like maybe the problem is with SinglePaged.

I tried running rougify style github >> combo.css, and it added some bash syntax highlighting but also outputted a bunch of white-on-white text. It did not fix the issue of the code block rendering as a single line, though.