The CI is broken because some of the sample notebooks are not normalized

[mwouts]

The CI fails because some of the sample notebooks have additional properties, with errors like e.g.

>           raise error
E           nbformat.validator.NotebookValidationError: Additional properties are not allowed ('execution_count', 'outputs' were unexpected)
E           
E           Failed validating 'additionalProperties' in raw_cell:
E           
E           On instance['cells'][0]:
E           {'cell_type': 'raw',
E            'execution_count': None,
E            'metadata': {},
E            'outputs': ['...0 outputs...'],
E            'source': '---\n'
E                      'title: "Quick test"\n'
E                      'output:\n'
E                      '  ioslides_presentation:\n'
E                      '    wid...'}

/opt/hostedtoolcache/Python/3.10.8/x64/lib/python3.10/site-packages/nbformat/validator.py:505: NotebookValidationError

For more similar errors, see the CI logs

[mwouts]

Obviously this is due to the way the collection of sample notebooks was built... many notebooks from many distinct languages, collected over a long period of time. I will follow the suggestion to call normalize.

[mwouts]

I cannot reproduce locally with nbformat==5.7.0 from conda... but once I remove it and install nbformat==5.7.0 (i.e. same version) from pip then I do get the same error as on the CI 😄