nbformat .ipynb notebooks are JSON documents with distinctions between input and output cells, and with output MIME types. https://jupyterbook.org/en/stable/content/code-outputs.html#...

`less -R` is not the default.

FWIW, textual (and urwid) does ANSII escape codes well: https://github.com/Textualize/textual

  touch file$'\n'name
  find . -print0 | xargs -0