3.9
Doc: fix import of asdl.py when called from outside Doc/. (GH-21529) (#21567)
[3.9] bpo-42042: Use ids attribute instead of names attribute (GH-22739) (GH-23265)
bpo-46463: Fixes escape4chm.py script used when building the CHM documentation file (GH-30768)
Issues #29349: Merge Py 2.6+ compatibility from 3.6
bpo-46231: Remove invalid_* rules preceded by more tokens from the grammar docs (GH-30341) (GH-30392)
[3.9] gh-121277: Allow .. versionadded:: next in docs (GH-121278) (#128117)
bpo-36853: Fix suspicious.py to actually print the unused rules (#13579)