[3.8] bpo-37309: idlelib/NEWS.txt - add missing period. (GH-17115)

miss-islington · terryjreedy · web-flow · commit 832341a07158 · 2019-11-12T02:21:06.000-08:00
(cherry picked from commit 8341a4d) Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
@@ -3,7 +3,7 @@ Released on 2019-12-16?
 ======================================
 
 
-bpo-38598: Do not try to compile IDLE shell or output windows
+bpo-38598: Do not try to compile IDLE shell or output windows.
 
 
 What's New in IDLE 3.7.5
