[issue31742] Default to emitting FutureWarning for provisional APIs

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

I imagine we could make it controlled by the same setting that controls deprecation warnings, with some way to differentiate them if you really need to.  I forget exactly how that warning control works, so maybe that would be awkward, but I wouldn't be surprised if it was relatively easy.  That way test runners would automatically be enabling the warning without having to do anything.  (If a test runner isn't already automatically enabling deprecation warnings, then I doubt it will want to automatically enable future warnings).

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