Example in docstring of get_inline_table_names does not work. Blocks conda-forge release.

[binste]

@jonmmease The example in the docstring of get_inline_table_names does not retrieve the table name. I don't know if there is a bug in the function or it's just the docstring that needs to be adapted.

spec = {
    "data": [
        {
            "name": "foo",
            "url": "https://path/to/file.csv"
        },
        {
            "name": "bar",
            "url": "table://inline_dataset_123"
        }
    ]
}
from altair.utils._vegafusion_data import get_inline_table_names
get_inline_table_names(spec)  # Returns an empty set

This came up in conda-forge/altair-feedstock#49

Btw, this did not come up in the tests as docstring tests are only run in the tests folder. We should probably change the pytest command to include the altair package -> pytest --doctest-modules altair tests.

[jonmmease]

Fix in #3175. This was an error in the doctest itself.