* _UnixSubprocessTransport: fix file mode of stdin. Open stdin in write mode,
  not in read mode
* Examples: close the event loop at exit
* More reliable CoroWrapper.__del__. If the constructor is interrupted by
  KeyboardInterrupt or the coroutine objet is destroyed lately, some the
  _source_traceback attribute doesn't exist anymore.
* repr(Task): include also the future the task is waiting for

* _UnixSubprocessTransport: fix file mode of stdin. Open stdin in write mode,
  not in read mode
* Examples: close the event loop at exit
* More reliable CoroWrapper.__del__. If the constructor is interrupted by
  KeyboardInterrupt or the coroutine objet is destroyed lately, some the
  _source_traceback attribute doesn't exist anymore.
* repr(Task): include also the future the task is waiting for

anymore. Before, it ignored I/O errors if at least the first C call read()
succeed.

it ignored I/O errors if at least the first C call read() succeed.

Patch by Pablo Torres Navarrete and SilentGhost.

parameters

parsing parameters

parameters.  ssl.RAND_add() now supports strings longer than 2 GB.

ssl.RAND_add() now supports strings longer than 2 GB.

to format C size_t, because %zi/%u is not supported on all platforms.

size_t, because %zi/%u is not supported on all platforms.

to remove duplication and return info for tests.  Rewrite corresponding tests.
Test_create_option_buttons was not testing anything because of buggy
comparisons.  Use Python subscripting to get widget options.

either deleting or moving to the module's main function.

test_utils.run_briefly() don't log the "destroy pending task" message anymore.
The log is redundant for run_until_complete() and useless in run_briefly().

don't log the "destroy pending task" message anymore. The log is redundant for
run_until_complete() and useless in run_briefly().

- Sort imports
- Simplify/optimize iscoroutine(). Inline inspect.isgenerator(obj): replace it
  with isinstance(obj, types.GeneratorType)
- CoroWrapper: check at runtime if Python has the yield-from bug #21209.  If
  Python has the bug, check if CoroWrapper.send() was called by yield-from to
  decide if parameters must be unpacked or not.
- Fix "Task was destroyed but it is pending!" warning in
  test_task_source_traceback()

- Sort imports
- Simplify/optimize iscoroutine(). Inline inspect.isgenerator(obj): replace it
  with isinstance(obj, types.GeneratorType)
- CoroWrapper: check at runtime if Python has the yield-from bug #21209.  If
  Python has the bug, check if CoroWrapper.send() was called by yield-from to
  decide if parameters must be unpacked or not.
- Fix "Task was destroyed but it is pending!" warning in
  test_task_source_traceback()