Describe new "str1 in str2" behavior.
diff --git a/Misc/NEWS b/Misc/NEWS
index 3c5c834..f397161 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -6,6 +6,10 @@
Core and builtins
+- Previously, "str1 in str2" required str1 to be a string of length 1.
+ This restriction has been relaxed to allow str1 to be a string of
+ any length. Thus "'el' in 'hello world'" returns True now.
+
- File objects are now their own iterators. For a file f, iter(f) now
returns f (unless f is closed), and f.next() is similar to
f.readline() when EOF is not reached; however, f.next() uses a