Message 120189 - Python tracker

At the top of Doc/library/functions.rst, which documents built-in functions like abs, getattr or hash, a comment reads “document all delegations to __special__ methods”.

Some functions are already good: enumerate for instance does link to the definition of iterator and hints about the __next__ method, format points to __format__, etc.  They can serve as example for how to add links (in plain text and in the global index).