Issue #22823: Use set literals instead of creating a set from a list.
Fixed an output of sets in examples.
Issue #22823: Fixed an output of sets in examples.

--HG--
branch : 3.4
Null merge
Issue 22823: Use set literal in idlelib.

--HG--
branch : 3.4
Merge with 3.4
asyncio, tulip issue 202: Add unit test of pause/resume writing for proactor
socket transport

--HG--
branch : 3.4
Merge 3.4 (asyncio)
Issue #22823: Fix typo in unittest/mock.py
asyncio, tulip issue 209: Fix subprocess for close_fds=False on Python 3.3

Mark the write end of the stdin pipe as non-inheritable.

--HG--
branch : 3.4
Merge 3.4 (asyncio)