[docs] [issue31369] re.RegexFlag is not included in __all__

[Pieter-Jan Briers]

Pieter-Jan Briers added the comment:

I suppose it may be an implementation detail, though I wouldn't be amazed that had enum existed when re was written it'd have been used instead of constant integers at the time. Though I do suppose exposing it fully would add two ways to get the flags which I can see how it would be considered bad.

It's still useful for type checking though, and while I did make a PR to add it to typeshed, that still leaves it in an iffy state and I probably would not be the last person to be confused by it initially.

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<http://bugs.python.org/issue31369>
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