gh-119180: Set the name of the param to __annotate__ to "format"

[JelleZijlstra]

This is what Larry wants, and so it shall be. It's a bit of a hack,
but it's localized and not too bad.

• Issue: Implement PEP 649 and PEP 749 #119180

[JelleZijlstra]

cc @larryhastings @carljm

[larryhastings]

Please add three tests that use an annotation of format, which is defined in a closure, class scope, and module scope respectively.

[JelleZijlstra]

@larryhastings done.

[larryhastings]

It just hit me--do you mind adding a fourth that fails because format is not defined? I mean, let's cover all our bases here. Let no one accuse us of not doing a thorough job!