Issue #27125: Merge typo fixes from 3.5

diff --cc Doc/library/enum.rst
Simple merge

diff --cc Doc/library/typing.rst
Simple merge

diff --cc Lib/test/test_dict.py
Simple merge

diff --cc Lib/test/test_socket.py
Simple merge

diff --cc Lib/tkinter/tix.py
Simple merge

diff --cc Misc/NEWS
Simple merge

diff --cc Modules/_ctypes/_ctypes.c
Simple merge

diff --cc Modules/_pickle.c
Simple merge

diff --cc Objects/bytesobject.c
Simple merge