How to mark cell boundaries with horizontal divider in percent format

[FlorianOtel]

Asking for guidance on how to mark cell boundary with horizontal divider -- as shown here: https://raw.githubusercontent.com/astoff/code-cells.el/images/screenshot.png

After instructing jupytext to use Jupytext - percent format the cells are shown correctly, but without the horizontal divider as in the screenshot above.

If this is a matter of configuring e.g. outline-minor-mode please provide instructions on how to do that and mark cell boundaries with horizontal divider.

Kind TIA for the advice -- and thanks for creating this lovely piece of code :)

[astoff]

You just need to enable code-cells-mode. If you don't see the highlight, there must be something else in your configuration conflicting with it (test with emacs -Q).

[FlorianOtel]

First, thanks for your answer

I have tried this:

• starting emacs emacs -Q
• loaded .emacs.d/elpa/code-cells-0.3/code-cells-autoloads.el
• switched to code-cells-mode
• loaded ipynb file.

Still no boundary between cells -- see attached screenshot (with light theme, it's the same with dark theme)

Edit: This is emacs 27.1 on Unbutu 20.04 under WSL2, with code-cells installed from ELPA under .emacs.d

[astoff]

From the screenshot it seems that you are running Emacs on the terminal. There, "overlining" text is just not available.

There's not much I can do here, except, perhaps, add a different cell boundary face on the terminal. It might be tricky to find a safe face that will work on any theme, but I'm open to suggestions.