Change config option name to correctly select kernel

[joergbrech]

Describe the bug

context

I have a jupyter-book using octave notebooks. Live-Code with thebe stopped working after updating jb to 0.13.1.

expectation.

Running live-code with thebe should work out of the box with an octave kernel, but it doesn't. Running the jupyter notebooks in mybinder.org works as expected.

bug

This seems to be caused by executablebooks/thebe#349. If I understand correctly, thebe >= 0.6.0 requires the kernel to be set via kernelOptions.name rather than kernelOptions.kernalName. I verified this by manually adding kernelOptions.name to a locally built html file.

possible fix

After a first glance at sphinx-thebe, I suppose it could suffice to fix this line:

sphinx-thebe/sphinx_thebe/__init__.py

Line 148 in d9c1f3d

kernelName: "{kernel_name}",

Reproduce the bug

As a consequence, the sphinx-thebe documentation is currently broken: Running the interactive R code on https://sphinx-thebe.readthedocs.io/en/latest/configure.html does not work.

List your environment

jupyter-book version 0.13.1

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