[3.6]Add IDLE items to NEWS and idlelib/NEWS.txt (#2239) (#2240)

Lib/idlelib/NEWS.txt

 What's New in IDLE 3.6.2
-Released on 2017-06-23?
+Released on 2017-06-30?
 ========================
 
+bpo-15786: Fix several problems with IDLE's autocompletion box.
+The following should now work: clicking on selection box items;
+using the scrollbar; selecting an item by hitting Return.
+Hangs on MacOSX should no longer happen. Patch by Louie Lu.
+
+bpo-25514: Add doc subsubsection about IDLE failure to start.
+Popup no-connection message directs users to this section.
+
+bpo-30642: Fix reference leaks in IDLE tests.
+Patches by Louie Lu and Terry Jan Reedy.
+
+bpo-30495: Add docstrings for textview.py and use PEP8 names.
+Patches by Cheryl Sabella and Terry Jan Reedy.
+
 bpo-30290: Help-about: use pep8 names and add tests.
 Increase coverage to 100%.
 Patches by Louie Lu, Cheryl Sabella, and Terry Jan Reedy.

Misc/NEWS

@@ -228,6 +228,20 @@ Library
 IDLE
 ----
 
+- bpo-15786: Fix several problems with IDLE's autocompletion box.
+  The following should now work: clicking on selection box items;
+  using the scrollbar; selecting an item by hitting Return.
+  Hangs on MacOSX should no longer happen. Patch by Louie Lu.
+
+- bpo-25514: Add doc subsubsection about IDLE failure to start.
+  Popup no-connection message directs users to this section.
+
+- bpo-30642: Fix reference leaks in IDLE tests.
+  Patches by Louie Lu and Terry Jan Reedy.
+
+- bpo-30495: Add docstrings for textview.py and use PEP8 names.
+  Patches by Cheryl Sabella and Terry Jan Reedy.
+
 - bpo-30290: Help-about: use pep8 names and add tests.
   Increase coverage to 100%.
   Patches by Louie Lu, Cheryl Sabella, and Terry Jan Reedy.