A first enhancement would be to add an index entry for "/" at:
https://docs.python.org/dev/genindex-Symbols.html

> I'll note that Googling on: "python slash in formal argument list" ...

We have to find a cute name for the "/ operator" in function definition! Like the "walrus operator" for "x := 1" :-D Nobody is able to find "/" in Google. And I'm not sure that "slash" is accurate enough, since it has multiple meaning.