[issue23189] Set docstrings to empty string when optimizing with -OO.

[Barry A. Warsaw]

Barry A. Warsaw added the comment:

That's a backward compatibility break since existing code may be expecting None.  At least it needs to be carefully considered, and should have no possibility of be applied to anything before Python 3.5.

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nosy: +barry
versions:  -Python 2.7, Python 3.2, Python 3.3, Python 3.4, Python 3.6

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