Congratulations on the release!

In https://news.ycombinator.com/item?id=27134785 in reply to me you said:

> You can display real production source code in code blocks in any language without having to copy-paste and it can stay in sync.

I've never tracked down the docs for doing that (e.g. including lines 31-34 from ../../src/path/to/library.py in the documentation and keeping it in sync as that expands to lines 31-36) - can you point me to them?