pydocstring extra-arguments lint rule

[blackmad-cradle]

Summary

I noticed when adding in pydocstring lint rules that ruff doesn't have a rule to warn when there's an argument definition in a docstring that isn't in the function parameters. This would be good to have when refactoring code.

Here's a minimal repro with the pydocstring rules turned on: https://play.ruff.rs/0f9db152-4bdf-4c4f-a4e9-8b3ccba1848c

I couldn't find another issue tracking this, so I'm starting a new one. If this is a dupe, apologies.

`"""example."""
def fibonacci(n):
"""Compute the nth number in the Fibonacci sequence.

Args:
n: number
x: extra arg
"""
pass`

I would like/expect to see an error for "x: extra arg"

[ntBre]

Interesting, I assumed we had a rule for that too. The closest, but opposite, is undocumented-param (D417). I think this case would be covered by DOC102 Docstring contains more arguments than in function signature from #12434, though. I see that there's a PR for DOC102 actually, I'll comment there as well.