Documentation: Fix indent in code blocks

[rafilong]

Issue
When viewing code samples in the docs, the code is indented, which limits viewing/readability and makes copy-paste more difficult.

Suggestion
To be honest, I'm not sure if there exists a solution simple enough to warrant fixing, as the current form is completely usable. Because the code is pulled from snippets.py, and omits the function declaration, if snippets.py is modified to remove the indent it will no longer compile. Maybe there is a way to retroactively remove indents during the docs compile process in the noxfile?