Issue #27369: Merge test_pyexpat from 3.3 into 3.4

diff --cc Lib/test/test_pyexpat.py
Simple merge

diff --cc Misc/NEWS
index 42d30a7cf4055edfbc2e6539643f83191e414820,ef5bdc8eec18667066b9dc3b005b8d10aa7d0a97..2d4b4da91060f1a58fd4bca7aed70d33dc4e2122
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -10,58 -10,52 +10,64 @@@ Release date: TB
  Core and Builtins
  -----------------
  
 -- Issue #25709: Fixed problem with in-place string concatenation and utf-8 cache.
 +Library
 +-------
  
 -- Issue #24407: Fix crash when dict is mutated while being updated.
++Tests
++-----
+ 
 -- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside
 -  __getattr__.
++- Issue #27369: In test_pyexpat, avoid testing an error message detail that
++  changed in Expat 2.2.0.
+ 
 -- Issue #24096: Make warnings.warn_explicit more robust against mutation of the
 -  warnings.filters list.
  
 -- Issue #24044: Fix possible null pointer dereference in list.sort in out of
 -  memory conditions.
 +What's New in Python 3.4.5?
 +===========================
  
 -- Issue #23055: Fixed a buffer overflow in PyUnicode_FromFormatV.  Analysis
 -  and fix by Guido Vranken.
 +Release date: 2016-06-26
  
 -Library
 --------
 +Tests
 +-----
  
 -- Issue #24521: Fix possible integer overflows in the pickle module.
 +- Issue #26867: Ubuntu's openssl OP_NO_SSLv3 is forced on by default; fix test.
  
 -- Issue #22931: Allow '[' and ']' in cookie values.
  
 -- Issue #24094: Fix possible crash in json.encode with poorly behaved dict
 -  subclasses.
 +What's New in Python 3.4.5rc1?
 +==============================
  
 -- Issue #23367: Fix possible overflows in the unicodedata module.
 +Release date: 2016-06-11
  
 -- Issue #23361: Fix possible overflow in Windows subprocess creation code.
 +Core and Builtins
 +-----------------
  
 -- Issue #23363: Fix possible overflow in itertools.permutations.
 +- Issue #26478: Fix semantic bugs when using binary operators with dictionary
 +  views and tuples.
  
 -- Issue #23364: Fix possible overflow in itertools.product.
 +- Issue #26171: Fix possible integer overflow and heap corruption in
 +  zipimporter.get_data().
  
 -- Issue #23369: Fixed possible integer overflow in
 -  _json.encode_basestring_ascii.
 +Library
 +-------
  
 -- Issue #23366: Fixed possible integer overflow in itertools.combinations.
 +- Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283.
  
 -- Issue #23365: Fixed possible integer overflow in
 -  itertools.combinations_with_replacement.
 +- Fix TLS stripping vulnerability in smptlib, CVE-2016-0772.  Reported by Team
 +  Oststrom
  
 -C API
 ------
 +- Issue #25939: On Windows open the cert store readonly in ssl.enum_certificates.
  
 -- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error
 +- Issue #26012: Don't traverse into symlinks for ** pattern in
 +  pathlib.Path.[r]glob().
 +
 +- Issue #24120: Ignore PermissionError when traversing a tree with
 +  pathlib.Path.[r]glob().  Patch by Ulrich Petri.
 +
 +- Skip getaddrinfo if host is already resolved.
 +  Patch by A. Jesse Jiryu Davis.
 +
 +- Add asyncio.timeout() context manager.
 +
 +- Issue #26050: Add asyncio.StreamReader.readuntil() method.
 +  Patch by Марк Коренберг.
  
  Tests
  -----