1 files changed, 4 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index f1acea776b..d6c7e39dfa 100644
--- a/NEWS
+++ b/NEWS
@@ -60,6 +60,10 @@ with all sufficient information, see the ChangeLog file.
     * URI::Generic#hostname
     * URI::Generic#hostname=
 
+* stringio
+  * extended methods:
+    * StringIO#set_encoding can get 2nd argument and optional hash.
+
 === Compatibility issues (excluding feature bug fixes)
 
 * Kernel#respond_to?