asyncio: six factory signatures show a `limit=None` default that is not accepted

[deadlovelll]

Documentation

Six signatures document limit=None, but the real default is 2 ** 16 and
None is not a valid option:

asyncio-stream.rst 52, 92, 140, 172 - open_connection, start_server, open_unix_connection, start_unix_server
asyncio-subprocess.rst 65, 87 - create_subprocess_exec, create_subprocess_shell

For example with open_connection:

import asyncio
asyncio.run(asyncio.open_connection("127.0.0.1", 9, limit=None))

Will raise TypeError: '<=' not supported between instances of 'NoneType' and 'int'

Proposed fix is to replace limit=None with limit=65536

Have a fix ready for that

Linked PRs

• gh-156246: Fix documented default of the asyncio limit argument #156247
• [3.15] gh-156246: Fix documented default of the asyncio limit argument (GH-156247) #156254
• [3.14] gh-156246: Fix documented default of the asyncio limit argument (GH-156247) #156255
• [3.13] gh-156246: Fix documented default of the asyncio limit argument (GH-156247) #156256