bpo-34162: Update idlelib/NEWS.txt to 2018-12-20. (#11255)
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index 6e11cab..b02b96b 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,9 @@
======================================
+bpo-35521: Document the editor code context feature.
+Add some internal references within the IDLE doc.
+
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