[issue17854] symmetric difference operation applicable to more than two sets

[Amit Saha]

Amit Saha added the comment:

On some more thought, perhaps the description should be updated. Since s^t^u is effectively (s^t)^u and hence the implementation does not violate the definition.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17854>
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