[issue45990] Exception notes need more documentation

Irit Katriel added the comment: https://www.python.org/dev/peps/pep-0678/ -- stage: -> resolved status: open -> closed ___ Python tracker ___

[issue45990] Exception notes need more documentation

New submission from Ram Rachum : The new __note__ feature for exception could be useful, but the documentation (and the section in "What's new") aren't good enough: "__note__: A mutable field which is :const:`None` by default and can be set to a string. If it is not :const:`None`, it is inclu