* bpo-37014: Update docstring and Documentation of fileinput.FileInput()

* Explain the behavior of fileinput.FileInput() when reading stdin.

* Update blurb.

* bpo-37014: Fix typo in the docstring and documentation.

Changes in bpo- 31858 made the less informative 'context_use_ps1' redundant.

bpo-35621: Support running subprocesses in asyncio when loop is executed in non-main thread (#13630)

bytesio_sizeof() must check if an error has occurred in _PySys_GetSizeOf().

Insertion in line order makes sorting keys by line order unneeded.

* Fixed some bugs.
* Added support for index-likes objects.
* Improved error messages.
* Cleaned up and optimized the code.
* Added more tests.

bpo-37122: Make co->co_argcount represent the total number of positonal arguments in the code object (GH-13726)

Fixed QueueListener in order to avoid random deadlocks.
Unable to add regression tests atm due to time constraints, will add it in a bit.
Regarding implementation, although it's nested, it does not cause performance issues whatsoever, and does not call task_done() in case of an exception (which is the right thing to do IMHO).


https://bugs.python.org/issue36813

Adds a new option in trace that allows tracing runnable modules. It is
exposed as `--module module_name` as `-m` is already in use for another
argument.

https://bugs.python.org/issue36818

This adds a vector of "search fingers" so that usable_arenas can be kept in sorted order (by number of free pools) via constant-time operations instead of linear search.

This should reduce worst-case time for reclaiming a great many objects from O(A**2) to O(A), where A is the number of arenas.  See bpo-37029.