> To recap, functions have a __get__() method so that they can be converted to a method when accessed as attributes. The non-data descriptor transforms an obj.f(*args) call into f(obj, *args). Calling cls.f(*args) becomes f(*args).

I THINK it should say

cls.f(*args) becomes f(cls, *args)

as stated in the table that follows that paragraph.

Let me provide a link to ease finding this piece of documentation

https://docs.python.org/3/howto/descriptor.html#static-methods

I think there isn't any error. Please look at the example provided in the guide:

class E:
    @staticmethod
    def f(x):
        print(x)

>>> E.f(3)
3

If it were as you say, method would receive two arguments - f(E, 3) - which is wrong.

I can see how that section intro is a bit confusing.  Am thinking it will be more clear if the heading "Static Methods" is to moved to just after the table showing the three variants.  Otherwise, it looks like the intro text is talking specifically about static methods.

New changeset f00e82f8b87c96ff76d6f768fa7a29cbd86eec6a by Raymond Hettinger in branch 'master':
bpo-43427:  Separte the method overview from the static method specifics. (GH-24787)
https://github.com/python/cpython/commit/f00e82f8b87c96ff76d6f768fa7a29cbd86eec6a

New changeset 45d9c8cda3db7da9fe209bd215ec9a120265ee65 by Miss Islington (bot) in branch '3.9':
bpo-43427:  Separte the method overview from the static method specifics. (GH-24787) (GH-24849)
https://github.com/python/cpython/commit/45d9c8cda3db7da9fe209bd215ec9a120265ee65