Missing position-only markers for function parameters

[slateny]

There are a number (>10) of modules with functions that don't have the position-only marker (see #91950, #94735), for example here is a (partial) list that contains a number of functions that should likely have position-only markers but are missing from the documentation (can also be verified via inspect.signature).

- [ ] atexit
- [x] audioop (skipped, module to be deprecated in 3.13)
- [ ] binascii
- [ ] cmath
- [ ] codecs
- [ ] csv
- [ ] ctypes
- [ ] curses
- [ ] curses
- [ ] decimal
- [ ] fcntl
- [ ] functools
- [ ] gc
- [ ] heapq
- [ ] hmac
- [ ] itertools
- [ ] keyword
- [ ] locale
- [ ] lzma
- [ ] marshal
- [ ] math
- [ ] operator
- [x] os
- [ ] ossaudiodev
- [ ] pwd
- [ ] pyexpat
- [ ] random
- [ ] readline
- [ ] resource
- [ ] secrets
- [ ] select
- [ ] signal
- [ ] socket
- [ ] spwd
- [ ] ssl
- [ ] stat
- [ ] struct
- [ ] sys
- [ ] syslog
- [ ] termios
- [ ] _thread
- [ ] threading
- [ ] time
- [ ] unicodedata
- [ ] weakref
- [ ] zlib

[slateny]

As there's quite a number of modules involved I'm wondering how best to structure PRs so it'd be easy to review, and have something like this in mind:

1. Provide some command to get all modified functions (git diff ...)
2. Copy-pastable list of functions with keyword arguments that can be run (all functions should raise TypeError) to confirm that the functions are indeed keyword-only, i.e.

import math
math.ceil(x=None)
math.comb(n=None, k=None)
math.copysign(x=None, y=None)
math.fabs(x=None)

results in

>>> math.ceil(x=None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: math.ceil() takes no keyword arguments
>>> math.comb(n=None, k=None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: math.comb() takes no keyword arguments
>>> math.copysign(x=None, y=None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: math.copysign() takes no keyword arguments
>>> math.fabs(x=None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: math.fabs() takes no keyword arguments

confirming the fact that these functions are missing the position-only marker.

3. Some diff command that can compare the two lists to confirm they're equivalent

Any more suggestions to make it easier to review / show correctness?