Add code language to code block

[gemoran]

Description

In my course notes, I'm often writing both Python and bash examples. To specify whether code is Python or bash, in a markdown cell, I use:

import numpy as np

or

pip install numpy

It would be great to have an option where the code language appears unobtrusively in the code block, as determined by .python, for example.

[gemoran]

It doesn't show above, but I use
```{.python filename="Python"} import numpy as np ```

[mcanouil]

Duplicate of:

• Visual disambiguation of code cells using different programming languages #12127