Library
-------
+- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError.
+ This makes `parser.clean()` work correctly.
+
+- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves
+ section order within the parser. This makes `parser.update()` preserve section
+ order as well.
+
+- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly
+ clears previous values stored in the default section. Same goes for
+ ``parser.update({'DEFAULT': {}})``.
+
- Issue #16819: IDLE method completion now correctly works for bytes literals.
- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy.
Library
-------
+- Issue #14590: configparser now correctly strips inline comments when delimiter
+ occurs earlier without preceding space.
+
- Issue #15424: Add a `__sizeof__()` implementation for array objects. Patch by
Ludwig Hähne.