Huh.  The sample code in my thread got goofed up somewhere along the way--maybe it's my fault, maybe it was done to me by some automated process.  Anyway, the example demonstrating classes inheriting annotations was meant to be formatted like this:

    class A:
        ax:int=3
    class B(A):
        pass
    print(getattr(B, '__annotations__', {}))

Maybe some over-smart doodad decided that no paragraph would ever start with spaces, so they helpfully removed them?  Hmm.