Issue #16115: Merge subprocess.Popen() documentation improvements from 3.2.

diff --cc Doc/library/subprocess.rst
Simple merge

diff --cc Misc/NEWS
index 29b6ff12d6f079c12ee5df7e3288030265213c35,759a12cffd1eebe905fa1766d66ea813ae9aeb85..184932fd4cadbd71a7d6e97fba64fd6d60b3c900
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -115,37 -3416,24 +115,40 @@@ Test
  Build
  -----
  
 -- Issue #10268: Add a --enable-loadable-sqlite-extensions option to configure.
 +- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError
 +  after 2801bf875a24 (see #15801).
 +
 +- Issue #15819: Make sure we can build Python out-of-tree from a readonly source
 +  directory.  (Somewhat related to issue #9860.)
 +
 +Documentation
 +-------------
 +
++- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
++  and executable arguments.
++
 +- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd
 +  argument.
  
 -- Issue #8852: Allow the socket module to build on OpenSolaris.
 +- Issue #15979: Improve timeit documentation.
  
 -- Drop -OPT:Olimit compiler option.
 +- Issue #16036: Improve documentation of built-in `int()`'s signature and
 +  arguments.
  
 -- Issue #10094: Use versioned .so files on GNU/kfreeBSD and the GNU Hurd.
 +- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and
 +  default arguments.  Patch contributed by Chris Jerdonek.
  
 -- Accept Oracle Berkeley DB 5.0 and 5.1 as backend for the dbm extension.
 +- Issue #11964: Document a change in v3.2 to the behavior of the indent
 +  parameter of json encoding operations.
  
 -- Issue #7473: avoid link errors when building a framework with a different set
 -  of architectures than the one that is currently installed.
 +Tools/Demos
 +-----------
  
  
 -What's New in Python 3.2 Alpha 3?
 -=================================
 +What's New in Python 3.3.0?
 +===========================
  
 -*Release date: 09-Oct-2010*
 +*Release date: 29-Sep-2012*
  
  Core and Builtins
  -----------------