3.9
bpo-39939: Add str.removeprefix and str.removesuffix (GH-18939)
Document CodeType.replace (GH-17776)
bpo-36127: Argument Clinic: inline parsing code for keyword parameters. (GH-12058)
bpo-37206: Unrepresentable default values no longer represented as None. (GH-13933)
bpo-46852: Rename float.__set_format__() to float.__setformat__() (GH-31558) (GH-31581)
bpo-37034: Display argument name on errors with keyword arguments with Argument Clinic. (GH-13593)
bpo-39573: Update clinic to use Py_IS_TYPE() function (GH-18507)
bpo-35582: Argument Clinic: Optimize the "all boring objects" case. (GH-11520)