[docs] [issue9056] Adding additional level of bookmarks and section numbers in python pdf documents.

Change by Cheryl Sabella <cheryl.sabella@gmail.com>: ---------- nosy: +cheryl.sabella, mdk versions: +Python 3.8 -Python 3.3 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue9056> _______________________________________