Contributed by Victor Salgado and Mayank Tripathi.

Issue #23206: Make ``json.dumps(..., ensure_ascii=False)`` as fast as the default case of ``ensure_ascii=True``.  Patch by Naoki Inada.

Patch by Davin Potts.

Patch by Davin Potts.

Issue #21902: Replace incorrect 'hyperbolic arc sine' (etc.) with 'inverse hyperbolic sine' (etc.).  Remove meaningless reference to radians.

Skip users with an empty home directory.

(currently only used for builds with <= 10.5 deployment targets)

Richard.

* Tulip issue 184: FlowControlMixin constructor now get the event loop if the
  loop parameter is not set. Add unit tests to ensure that constructor of
  StreamReader and StreamReaderProtocol classes get the event loop.
* Remove outdated TODO/XXX

importlib.abc.Loader.exec_module() is also defined.

Before this change, create_module() was optional **and** could return
None to trigger default semantics. This change now reduces the
options for choosing default semantics to one and in the most
backporting-friendly way (define create_module() to return None).

atomic memory access if available. Patch written by Vitor de Lima and Gustavo
Temple.

* Document why set_result() calls are safe
* Cleanup gather(). Use public methods instead of hacks to consume the
  exception of a future.
* sock_connect(): pass directly the fd to _sock_connect_done instead of the
  socket.