"the gray background goes all the way" but doesn't

[Y-Less]

Describe the bug

The text that claims the whole background should be grey is on a white background.

Steps to reproduce

1. Go to: https://alvaromontoro.github.io/almond.css/demo/
2. Scroll right in the "Pre with Code".

Expected behavior

Well the text claims that the whole thing should be gray[sic], but it isn't.

Screenshots

Devices

Additional context

[alvaromontoro]

Thank you for reporting the issue. What OS and browser are you using?

[hdJerry]

I am unable to replicate it with the steps provided, is this issue still valid @alvaromontoro