Issue #1686: Fix string.Template when overriding the pattern attribute.
diff --git a/Misc/NEWS b/Misc/NEWS
index 34cea64..cdac64e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -52,6 +52,8 @@
 Library
 -------
 
+- Issue #1686: Fix string.Template when overriding the pattern attribute.
+
 - Issue #9854: SocketIO objects now observe the RawIOBase interface in
   non-blocking mode: they return None when an operation would block (instead
   of raising an exception).