object doesn't have an __enter__/__exit__ yet docs say it does

Documentation

Here's the current docs in the Python data model on object.__enter__:

object.__enter__(self)

And object.__exit__:

object.__exit__(self, exc_type, exc_value, traceback)

However, with Python 3.10.3, we see neither of these methods belong to object:

>>> object.__enter__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: type object 'object' has no attribute '__enter__'. Did you mean: '__ne__'?
>>> object.__exit__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: type object 'object' has no attribute '__exit__'. Did you mean: '__init__'?

I think the docs could be:

• More clear that __enter__ and __exit__ are not methods on object
• Mention where they come from (just being defined within your object to match the interface)

Thank you for your consideration!

Start with the Python data model documentation sections for object.enter and object.exit linked in the issue, and verify their current wording against Python 3.10.3. Update the documentation to clarify that these methods are not defined on object and explain that context manager objects define them to provide the interface; done means the documented behavior matches the runtime.