Thank you for your post, regarding https://docs.python.org/3/reference/datamodel.html#the-standard-type-hierarc....
You've suggested changing "built-in name None" to "keyword None". I think that's a good change. And similar changes might be welcome elsewhere in the docs, perhaps also for True and False.
And I think there's more. The page says
None This type has a single value. There is a single object with this value. [...]
I think it better to write
NoneType This type has a single value, `None`. The keyword `None` always gives the value `None`.
Once again, thank you for your close attention to detail.