Message 405744 - Python tracker

I was attempting to look through hashlib to try and understand more about python's built-in hash functions. As part of this, I ran 'help(_hashlib)' which returns this text: 'MODULE REFERENCE
    https://docs.python.org/3.11/library/_hashlib.html'

This is an invalid link which has been an issue in all versions of the documentation I looked up.

As an aside, where would I find the source for _hashlib?