Michael Clarkson

I think I also have this issue. See [this page](https://cs3110.github.io/textbook/chapters/preface/about.html) as an example, specifically the first code block on the page (under the heading "Executable Code"). When launched using the...

The error "traceback" (if it is that, depending on the language) format is dependent on the kernel, not the code block -- since there is only one kernel per notebook....

Should this be working in Jupyter Book at this point? I'm running with v0.13.0. I tried adding that notebook metadata but the python lexer is still being used: ``` /Users/clarkson/repos/cs3110/textbook/src/chapters/basics/expressions.md:570:...

I am unable to test this end-to-end because Jupyter Book is not using the latest version of MyST-NB. So I will open a corresponding issue in Jupyter Book.

It would be wonderful if this could be fixed. I teach a university class that uses OCaml, and this impacts hundreds of my students each semester.