bpo-34162: Add entries for idlelib/NEWS.txt (GH-12232)

(cherry picked from commit 8a1bab9)

Co-authored-by: Terry Jan Reedy <[email protected]>

Author: miss-islington

Lib/idlelib/NEWS.txt

@@ -3,6 +3,12 @@ Released on 2019-??-??
 ======================================
 
 
+bpl-36152: Remove colorizer.ColorDelegator.close_when_done and the
+corresponding argument of .close().  In IDLE, both have always been
+None or False since 2007.
+
+bpo-36096: Make colorizer state variables instance-only.
+
 bpo-24310: Document settings dialog font tab sample.
 
 bpo-35689: Add docstrings and tests for colorizer.