* master: (1204 commits)
  bpo-31855: unittest.mock.mock_open() results now respects the argument of read([size]) (pythonGH-11521)
  Forbid creating of stream objects outside of asyncio (python#13101)
  bpo-35925: Skip SSL tests that fail due to weak external certs. (pythonGH-13124)
  Fix rst formatting for several links in ssl documentation (pythonGH-13133)
  bpo-36542: Allow to overwrite the signature for Python functions. (pythonGH-12705)
  bpo-36793: Remove unneeded __str__ definitions. (pythonGH-13081)
  bpo-36766: Typos in docs and code comments (pythonGH-13116)
  bpo-36275: enhance documentation for venv.create() (pythonGH-13114)
  Clarify the download unit in the download section (pythonGH-13122)
  bpo-30668: add missing word in license.rst (pythonGH-13115)
  Unroll import-team in CODEOWNERS (python#13118)
  bpo-36594: Fix incorrect use of %p in format strings (pythonGH-12769)
  bpo-36798: Updating f-string docs for := use case (pythonGH-13107)
  Update wsgiref.rst (python#10488)
  Doc/c-api/exceptions.rst: fix grammar (python#12091)
  bpo-36811: Fix a C compiler warning in _elementtree.c. (pythonGH-13109)
  Only count number of members once (python#12691)
  bpo-16024: Doc cleanup regarding path_fd, dir_fd, follow_symlinks (pythonGH-5505)
  bpo-36791: Safer detection of integer overflow in sum(). (pythonGH-13080)
  bpo-33530: Implement Happy Eyeballs in asyncio, v2 (pythonGH-7237)
  ...