Code blocks with captions have a different line width

[akhmerov]

Describe the bug

Code blocks with a caption have a different width from regular code blocks

To Reproduce

Steps to reproduce the behavior:

1. Go to https://sphinx-book-theme.readthedocs.io/en/latest/reference/demo.html#code-blocks
2. View the result.

Expected behavior

Same width of code blocks regardless of caption

Environment

This repository :)

[choldgraf]

@akhmerov think you could re-title this to be only about the first issue you bring up, since #258 covers your second point? :-)

[fmaussion]

😱 OMG and there is still a python 2 snippet in the docs!

[fmaussion]

#262

[akhmerov]

Thanks, I fixed the issue description to avoid duplication.

[choldgraf]

This is now fixed!