Code snippets in Getting started documentation not correctly displayed

[deepblue597]

Describe the bug

The code snippets inside the Introduction documentation are not shown correctly. I attach two images for a better understanding

[e10e3]

To refine the issue: the output blocks in the documentation are covered in terminal escape codes.
These sequences are meant to show a coloured output in a terminal, but their bare form impedes readability.

See it in action: https://riverml.xyz/latest/introduction/getting-started/binary-classification/.

Interestingly, the unreleased documentation is exempt from this : https://riverml.xyz/dev/introduction/getting-started/binary-classification/.