Fix slightly misleading statement in the NEWS file.
diff --git a/Misc/NEWS b/Misc/NEWS
index 0989cfe..c3e1bb4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -60,7 +60,8 @@
raised an AttributeError.
- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
- asking for a specific length.
+ asking for a specific length. This problem only affected files opened
+ using the new "io" module, not the built-in open() function.
- Issue #3449: Update decimal module to use most recent specification
(v. 1.68) and tests (v. 2.58) from IBM.