fix up some C signatures

[tungol]

a few issues exposed after python/mypy#18259 was merged

[tungol]

The failure is pyright noticing that random.Random.__init__ and random.Random.__new__ don't match on 3.9. Most critically, _random.Random.__new__ is positional only, but only if it's passed _random.Random.

>>> _random.Random.__new__(random.Random, x=1)
<random.Random object at 0x15c009010>

>>> random.Random.__new__(random.Random, x=1)
<random.Random object at 0x14a808210>

but

>>> _random.Random.__new__(_random.Random, x=1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Random()() takes no keyword arguments

>>> random.Random.__new__(_random.Random, x=1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Random()() takes no keyword arguments

I'm not sure what the best approach to this is.

That said, looking at the code, while it accepts the kwarg when passed random.Random, it doesn't actually use it.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

discord.py (https://github.com/Rapptz/discord.py)
- discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:834: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:858: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:883: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/hybrid.py:935: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/bot.py:290: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]
- discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "with_app_command", "name"  [misc]
+ discord/ext/commands/bot.py:314: error: Overlap between argument names and ** TypedDict items: "name", "with_app_command"  [misc]

[JelleZijlstra]

Thank you!

[JelleZijlstra]

@tungol there's some more here https://github.com/python/typeshed/actions/runs/17160218615/job/48687325575?pr=14599, I think they're new in 3.14.