text: Title: Docs: Code block line length
  Body: ### Summary
  
  For documentation, and only documentation, if you have an overly long code block it enters scrollable window.
  
  We should set `blacken-docs` configuration (and eventually `ruff` when https://github.com/astral-sh/ruff/issues/8237 happens) to line lengths somewhere on the lower end (maybe 80?); this goes together with manually ensuring `.. code-block::` directives are not overly long