[issue23201] Decimal(0)**0 is an error, 0**0 is 1, but Decimal(0) == 0

[Terry J. Reedy]

Terry J. Reedy added the comment:

Thank you Tim.

A possibility would be to add "(disallowed by the Decimal standard)" to the exception message.

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nosy: +terry.reedy
versions:  -Python 3.6

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<http://bugs.python.org/issue23201>
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