Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.

Patch by Arfrever Frehtes Taifersar Arahesis.

diff --cc Misc/NEWS
index a9f944a9b96c7d28232fdf39535eb11a3c8c8ca7,50ac145daadadf991290493f6dd2ff35eb88ff66..4dab25f056c14a62d061b8b258be4ec89cc93b3f
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -2,31 -2,10 +2,37 @@@
  Python News
  +++++++++++
  
 -What's New in Python 3.3.5 release candidate 1?
 +What's New in Python 3.4.1?
 +===========================
 +
 +Core and Builtins
 +-----------------
 +
 +- Issue #20637: Key-sharing now also works for instance dictionaries of
 +  subclasses.  Patch by Peter Ingebretson.
 +
 +Library
 +-------
 +
 +- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
 +  outsize range [1902; 2037].
 +
 +Tests
 +-----
 +
 +- Issue #20743: Fix a reference leak in test_tcl.
 +
++Tools/Demos
++-----------
++
++- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
++  Patch by Arfrever Frehtes Taifersar Arahesis.
++
 +
 +What's New in Python 3.4.0 release candidate 2?
  ===============================================
  
 -*Release date: XXXX-XX-XX*
 +Release date: 2014-02-23
  
  Core and Builtins
  -----------------