doc/CHANGES.txt · 372b048205e513983c197569400216c7f76f0ef4 · Kirill Smelkov / Zope · GitLab

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The set operation difference(X, None) was returning None instead of · 372b0482
Tim Peters authored Jun 23, 2002
```
returning X, contradicting the docs and common sense.
difference(None, X) continues to return None.
```
372b0482

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CHANGES.txt 15.5 KB