Parameter range is incorrect for *args and **kwargs

[GtrMo]

I'm working on a fix for the flake8-unused-arguments (ARG) rules that would delete them.

While working on this, I noticed that the *args and **kwargs Parameter.range does not include the *.
I think that Parameter.range should include * or **, leaving Parameter.name.range for the actual name range if needed.

def f(*args, **kwargs): pass
#      ~~~~    ~~~~~~    <-- actual range
#     ^^^^^  ^^^^^^^^    <-- expected range

See the currently generated AST

ruff/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap

Lines 58 to 67 in 7b4a73d

	vararg: Some(
	Parameter {
	range: 16..20,
	name: Identifier {
	id: "args",
	range: 16..20,
	},
	annotation: None,
	},
	),

Here I would expect the Parameter range to be 1 longer than the Identifier range.

ruff/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap

Lines 124 to 134 in 7b4a73d

	kwarg: Some(
	Parameter {
	range: 39..45,
	name: Identifier {
	id: "kwargs",
	range: 39..45,
	},
	annotation: None,
	},
	),
	},

And here I would expect the Parameter range to be 2 longer than the Identifier range.

If this is indeed considered a bug, I have a PR ready to fix it.

[charliermarsh]

I generally agree, since x: int = 1 is the parameter range for a non-variadic parameter, it makes sense that the * and ** would be included. CPython doesn't seem to include it in the range, but our AST structure is a bit different...