* Constant folding is moved from peephole optimizer to new AST optimizer.
(Contributed by Eugene Toder and INADA Naoki in :issue:`29469`)
-* Most functions and methods in :mod:`abc` have been rewrittent in C.
+* Most functions and methods in :mod:`abc` have been rewritten in C.
This makes creation of abstract base classes, and calling :func:`isinstance`
and :func:`issubclass` on them 1.5x faster. This also reduces Python
start-up time by up to 10%. (Contributed by Ivan Levkivskyi and INADA Naoki