[3.7] bpo-34162: Update idlelib/NEWS.txt to 2018-12-20 (GH-11255) (#11256)
Cherry-picked from 87ec110.
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index b93769e..e36d904 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -1,8 +1,16 @@
-What's New in IDLE 3.7.2
-Released on 2018-07-31?
+What's New in IDLE 3.7.3
+Released on 2019-??-??
======================================
+bpo-35521: Document the editor code context feature.
+Add some internal references within the IDLE doc.
+
+
+What's New in IDLE 3.7.2
+Released on 2018-12-21?
+======================================
+
bpo-34864: When starting IDLE on MacOS, warn if the system setting
"Prefer tabs when opening documents" is "Always". As previous
documented for this issue, running IDLE with this setting causes