False positive differing-param-doc if positional-only

[spagh-eddie]

Bug description

I have a docparam for bar, but pylint complains.
If I make bar not positional-only and remove , / from function definition, pylint does not complain.

# pylint: disable=missing-module-docstring,disallowed-name
def foo(bar: int, /):
    """Foo a bar

    :param bar: not spam
    """
    return bar + 1

I did a bit of digging myself and saw that bar was not included in this arguments_node.args, but it is included in arguments_node.arguments. I am not familiar enough with these to say anything like "it should be .arguments instead of .args."

Configuration

# pyproject.toml
[tool.pylint.master]
load-plugins = [
    "pylint.extensions.docparams",
    "pylint.extensions.docstyle",
]

Command used

pylint --score no test.py

Pylint output

************* Module test
test.py:2:0: W9017: "bar" differing in parameter documentation (differing-param-doc)

Expected behavior

expect no output, same as if remove , /

Pylint version

pylint 2.14.1
astroid 2.11.5
Python 3.10.1 (main, Jan 12 2022, 15:59:59) [Clang 13.0.0 (clang-1300.0.27.3)]

OS / Environment

macOS 12.0.1 (21A559)

Additional dependencies

No response

[mpernigo]

I have done some digging, too.
I think posonly could be handled similar to how kwonly are (docparams.py#L527, docparams.py#L542-L544).

I could open a PR for this - unless anybody already started working on it 👍