SF patch #445412 extract ndiff functionality to difflib, from

David Goodger.

Misc/ACKS

@@ -144,6 +144,7 @@ Harry Henry Gebel
 Thomas Gellekum
 Ben Gertzfield
 Jonathan Giddy
+David Goodger
 Hans de Graaff
 Duncan Grisby
 Dag Gruneau

Misc/NEWS

@@ -3,6 +3,9 @@ What's New in Python 2.2a2?
 
 Tests
 
+- regrtest.py now knows which tests are expected to be skipped on some
+  platforms, allowing to give clearer test result output.
+
 - Several new tests in the standard test suite, with special thanks to
   Nick Mathewson.
 
@@ -14,6 +17,10 @@ Core
 
 Library
 
+- New class Differ and new functions ndiff() and restore() in difflib.py.
+  These package the algorithms used by the popular Tools/scripts/ndiff.py,
+  for progammatic reuse.
+
 - New function xml.sax.saxutils.quoteattr():  Quote an XML attribute
   value using the minimal quoting required for the value; more
   reliable than using xml.sax.saxutils.escape() for attribute values.