[docs] [issue23758] Improve documenation about num_params in sqlite3 create_function and create_aggregate

Berker Peksag added the comment: Thank you Cédric. I also added tests to verify the behavior of num_params=-1. ---------- resolution: -> fixed stage: patch review -> resolved status: open -> closed versions: +Python 3.6 -Python 3.4 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue23758> _______________________________________