code-cell using new/strange font -- how to revert to a fixed-width font?

[uqtmiller]

Describe the bug

Hi,

When I do compile a book with a python code-cell, I expected the code-cell to use a usual "code-looking", fixed-width font.

But instead, it uses a font I don't expect, which seems to be Roboto (if I paste it into MS Word as see the font name).

Here is my code-cell:

x = 1
if x == 1:
    print("True")

Here is the output:

This is fine for such a small example, but for larger it affects readability:

I'm not sure when this started happening, but I noticed it recently.

Any ideas what I'm doing wrong and how to change this?

Thanks! Tim

Reproduce the bug

For me, paste:

x = 1
if x == 1:
    print("True")

and compile using 'jb build'

List your environment

Details: jupyter-book --version Jupyter Book : 1.0.0 External ToC : 1.0.1 MyST-Parser : 2.0.0 MyST-NB : 1.0.0 Sphinx Book Theme : 1.1.2 Jupyter-Cache : 0.6.1 NbClient : 0.7.4

python3 --version Python 3.10.12

Operating system: Ubuntu 22.04.2 LTS

Example website: https://gibberblot.github.io/rl-notes/single-agent/value-iteration.html

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[gibberblot]

This can now be closed. I had tried on several platforms, but hadn't built this on another platform until today. It worked on someone else's laptop, so I dug much deeper and figured out the issue was a local problem.

Thanks!