Apply patch diff.txt from SF feature request
http://www.python.org/sf/444708

This adds the optional argument for str.strip
to unicode.strip too and makes it possible
to call str.strip with a unicode argument
and unicode.strip with a str argument.
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py
index 180072c..4185b9b 100644
--- a/Lib/test/string_tests.py
+++ b/Lib/test/string_tests.py
@@ -169,12 +169,18 @@
     test('rstrip', '   hello   ', '   hello', None)
     test('strip', 'hello', 'hello', None)
 
-    # strip/lstrip/rstrip with real arg
+    # strip/lstrip/rstrip with str arg
     test('strip', 'xyzzyhelloxyzzy', 'hello', 'xyz')
     test('lstrip', 'xyzzyhelloxyzzy', 'helloxyzzy', 'xyz')
     test('rstrip', 'xyzzyhelloxyzzy', 'xyzzyhello', 'xyz')
     test('strip', 'hello', 'hello', 'xyz')
 
+    # strip/lstrip/rstrip with unicode arg
+    test('strip', 'xyzzyhelloxyzzy', u'hello', u'xyz')
+    test('lstrip', 'xyzzyhelloxyzzy', u'helloxyzzy', u'xyz')
+    test('rstrip', 'xyzzyhelloxyzzy', u'xyzzyhello', u'xyz')
+    test('strip', 'hello', u'hello', u'xyz')
+
     test('swapcase', 'HeLLo cOmpUteRs', 'hEllO CoMPuTErS')
     test('translate', 'xyzabcdef', 'xyzxyz', transtable, 'def')