Update docs for new backported features from Py3.4

Author: edschofield

docs/quickstart.rst

@@ -102,7 +102,7 @@ to be accessed under their Python 3 names and locations in Python 2::
     import queue
     import configparser
     from collections import UserDict, UserList, UserString
-    from collections import Counter, OrderedDict   # even on Py2.6
+    from collections import Counter, OrderedDict, ChainMap   # even on Py2.6
     from itertools import filterfalse, zip_longest
 
     import html

docs/standard_library_imports.rst

@@ -105,8 +105,6 @@ package makes the Python 3.x APIs available on Python 2.x as follows::
 
     from sys import intern
 
-    from math import ceil         # now returns an int
-
     import test.support
 
     import urllib.error
@@ -116,20 +114,26 @@ package makes the Python 3.x APIs available on Python 2.x as follows::
     import urllib.robotparser
 
 
-Backports also exist of the following features from Python 2.7+ for Python 2.6:
+Backports also exist of the following features from Python 3.4:
 
-- collections.Counter
-- collections.OrderedDict
-- itertools.count (with an optional step parameter)
+- ``math.ceil`` returns an int on Py3
+- ``collections.OrderedDict``  (for Python 2.6)
+- ``collections.Counter``      (for Python 2.6)
+- ``collections.ChainMap``     (for all versions prior to Python 3.3)
+- ``itertools.count``          (for Python 2.6, with step parameter)
+- ``subprocess.check_output``  (for Python 2.6)
+- ``reprlib.recursive_repr``
 
-These can be imported on Python 2.6 as follows::
+These can then be imported on Python 2.6+ as follows::
 
     from future.standard_library import install_aliases
     install_aliases()
 
-    from collections import Counter, OrderedDict
+    from math import ceil      # now returns an int
+    from collections import Counter, OrderedDict, ChainMap
     from itertools import count
     from subprocess import check_output
+    from reprlib import recursive_repr
 
 
 External standard-library backports

docs/whatsnew.rst

@@ -17,6 +17,8 @@ Minor features:
 - ``collections.ChainMap`` backport (issue #150)
 - ``itertools.count`` backport for Py2.6 (issue #152)
 - Add constants to ``http.client`` such as ``HTTP_PORT`` and ``BAD_REQUEST`` (issue #137)
+- ``reprlib.recursive_repr`` backport for Py2
+- Update backports of ``Counter`` and ``OrderedDict`` to use Py3.4 implementations. This fixes ``.copy()`` for subclasses etc.
 
 Bug fixes:
 

src/future/backports/misc.py

@@ -1,5 +1,5 @@
 """
-Miscellaneous function (re)definitions from the Py3.3+ standard library
+Miscellaneous function (re)definitions from the Py3.4+ standard library
 for Python 2.6/2.7.
 
 - math.ceil                (for Python 2.7)
@@ -8,6 +8,7 @@
 - collections.ChainMap     (for all versions prior to Python 3.3)
 - itertools.count          (for Python 2.6, with step parameter)
 - subprocess.check_output  (for Python 2.6)
+- reprlib.recursive_repr   (for Python 2.6+)
 """
 
 import subprocess

src/future/standard_library/__init__.py

@@ -197,6 +197,7 @@
          ('collections', 'OrderedDict', 'future.backports.misc', 'OrderedDict'),
          ('collections', 'Counter', 'future.backports.misc', 'Counter'),
          ('itertools', 'count', 'future.backports.misc', 'count'),
+         ('reprlib', 'recursive_repr', 'future.backports.misc', 'recursive_repr'),
 
 # This is no use, since "import urllib.request" etc. still fails:
 #          ('urllib', 'error', 'future.moves.urllib', 'error'),