Document the fact that '\U' and '\u' escapes are not treated specially in 3.0 (see issue 2541)
diff --git a/Doc/whatsnew/3.0.rst b/Doc/whatsnew/3.0.rst
index 7f8ba47..11b56cc 100644
--- a/Doc/whatsnew/3.0.rst
+++ b/Doc/whatsnew/3.0.rst
@@ -167,6 +167,9 @@
   explicitly convert between them, using the :meth:`str.encode` (str -> bytes)
   or :meth:`bytes.decode` (bytes -> str) methods.
 
+* All backslashes in raw strings are interpreted literally.  This means that
+  Unicode escapes are not treated specially.
+
 .. XXX add bytearray
 
 * PEP 3112: Bytes literals, e.g. ``b"abc"``, create :class:`bytes` instances.
@@ -183,6 +186,8 @@
 * The :mod:`StringIO` and :mod:`cStringIO` modules are gone.  Instead, import
   :class:`io.StringIO` or :class:`io.BytesIO`.
 
+* ``'\U'`` and ``'\u'`` escapes in raw strings are not treated specially.
+
 
 PEP 3101: A New Approach to String Formatting
 =============================================