Code tabs from sphinx-tabs don't render

Describe the bug When using code-tabs from the sphinx-tabs package:

• reStructuredText for the tabs is generated and displayed, but is not rendered
• the code is displayed within a highlight box but without the appropriate syntax highlighting

The tabs are rendered as:

.. tab:: {“tab_id”: “UHl0aG9u”, “classes”: [“code-tab”]} Python

.. code-block:: py

# Code is displayed within a highlight box here

I doubt that this is related, but there is 1 warning when building the minimal example book with or without tabs: WARNING: unsupported theme option 'number_toc_sections' given

See this example repo.

To Reproduce

1. Add the extension:

sphinx:
  extra_extensions:
    - sphinx_tabs.tabs

1. Include code-tab syntax in a .md file within the book. For example:

````{tabs}

```{code-tab} py

    def main():
        return

```

```{code-tab} c
int main(const int argc, const char **argv) {
    return 0;
    }
```

````

1. Build the book using jb build .

Expected behavior I expect this to render as grouped tabs, with the code syntax highlighted as appropriate.

Environment (please complete the following information):

• Python Version: 3.7.7
• sphinx-tabs: 1.1.13
• Jupyter Book: 0.7.1
• MyST-NB: 0.8.4
• Sphinx Book Theme: 0.0.31
• MyST-Parser: 0.9.0
• Jupyter-Cache: 0.2.2

[foster999]

Exactly what I was looking for - thanks very much for your help with all of this!

[foster999]

Ah that makes sense! Odd that the standard tabs do support Markdown, but not the grouped versions.

Thanks for this. 1 works perfectly, I look forward to 2, and will follow up 3 on sphinx-tabs.