exercise icon not rendering properly

[daviddesancho]

Describe the bug

When I render a jupyterbook including exercise directives I find that the icon used is not a pencil, but a bell.

Someone at stackoverflow has suggested a possible culprit.

Reproduce the bug

Information in my requirements.txt file:

sphinx
sphinx-exercise

Information in the _config.yml file:

sphinx:
  config:
    mathjax_path: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js
  extra_extensions:
    - sphinx_exercise

In the markdown notebooks:

:nonumber:
:class: dropdown

Text of the exercise

List your environment

Jupyter Book      : 0.15.1
External ToC      : 0.3.1
MyST-Parser       : 0.18.1
MyST-NB           : 0.17.1
Sphinx Book Theme : 1.0.1
Jupyter-Cache     : 0.5.0
NbClient          : 0.5.13

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[AakashGfude]

Hi @daviddesancho, Thanks for pointing this out. The solution seems reasonable. We will make a fix soon.

[jkooij]

I'm seeing the same problem while trying to use sphinx-exercise in a jupyter-book.
After using pip install sphinx-exercise I created a clean build using

jupyter-book clean .
jupyter-book build . --all

but that did not solve the problem, I see the bell and the missing f303 icon placeholder: