[docs] [issue35616] Change references to '4.0'.

STINNER Victor <vstinner@redhat.com> added the comment:

One or two versions after using Py_DEPRECATED for all deprecated functions (but not earlier than EOL of 2.7) we can make them issuing run-time warnings.

Maybe we can experiment adding warnings only in development mode, when python3 -X dev is used?

I'm working on this.

Thanks :-) ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue35616> _______________________________________