Fix docs/comments to refer to the correct version number

Author: edschofield

docs/pasteurize.rst

@@ -31,7 +31,7 @@ refer to stdlib modules (as well as builtins) under their Py3 names.
 
 Note also that the ``configparser`` module is a special case; there is a full
 backport available on PyPI (https://pypi.python.org/pypi/configparser), so, as
-of v0.18.0, ``python-future`` no longer provides a ``configparser`` package
+of v0.16.0, ``python-future`` no longer provides a ``configparser`` package
 alias. To use the resulting code on Py2, install the ``configparser`` backport
 with ``pip install configparser`` or by adding it to your ``requirements.txt``
 file.

docs/standard_library_imports.rst

@@ -77,7 +77,7 @@ complete list is here::
     import _markupbase
     import _thread
 
-Note that, as of v0.18.0, ``python-future`` no longer includes an alias for the
+Note that, as of v0.16.0, ``python-future`` no longer includes an alias for the
 ``configparser`` module because a full backport exists (see https://pypi.python.org/pypi/configparser). 
 
 .. _list-standard-library-refactored:

setup.py

@@ -58,7 +58,7 @@
 if sys.version_info[:2] < (3, 0):
     PACKAGES += [
             "builtins",
-            # "configparser",  # removed in v0.18.0
+            # "configparser",  # removed in v0.16.0
             "copyreg",
             "html",
             "http",

src/future/standard_library/__init__.py

@@ -738,7 +738,7 @@ class exclude_local_folder_imports(object):
     A context-manager that prevents standard library modules like configparser
     from being imported from the local python-future source folder on Py3.
 
-    (This was need prior to v0.18.0 because the presence of a configparser
+    (This was need prior to v0.16.0 because the presence of a configparser
     folder would otherwise have prevented setuptools from running on Py3. Maybe
     it's not needed any more?)
     """

tests/test_future/test_standard_library.py

@@ -271,7 +271,7 @@ def test_import_failure_from_module(self):
         with self.assertRaises(CalledProcessError):
             output = self._run_test_script('importme1.py')
 
-    # Disabled since v0.18.0:
+    # Disabled since v0.16.0:
     # def test_configparser(self):
     #     import configparser