Fix the NEWS about my last commit: an unicode subclass can now override the
__unicode__ method (and not the __str__ method).

Simplify also the testcase.
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 973a008..368788f 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -1195,8 +1195,6 @@
 
     def test_format_subclass(self):
         class U(unicode):
-            def __str__(self):
-                return '__str__ overridden'
             def __unicode__(self):
                 return u'__unicode__ overridden'
         u = U(u'xxx')
diff --git a/Misc/NEWS b/Misc/NEWS
index 12db4af..385e341 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,7 +12,7 @@
 Core and Builtins
 -----------------
 
-- Issue #1583863: An unicode subclass can now override the __str__ method
+- Issue #1583863: An unicode subclass can now override the __unicode__ method
 
 - Issue #6474: Make error message from passing an inadequate number of keyword
   arguments to a function correct.