`Table.summary` raises an error if one column contains only null values

[Marsmaennchen221]

Describe the bug

If a column of a table contains only null values, the method Table.summary raises an IndexError because the stability of a column with only null values is not defined (#319).

To Reproduce

from safeds.data.tabular.containers import Table

table = Table({"Column1": [None, 2], "Column2": [None, None]})

print(table.summary())

Expected behavior

The stability of a column with only null values should just be skipped and displayed in the returned table as a minus: -

Screenshots (optional)

No response

Additional Context (optional)

Related to #319

[lars-reimann]

🎉 This issue has been resolved in version 0.14.0 🎉

The release is available on:

• v0.14.0
• GitHub release

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