Add items to MISC/NEWS and idlelib/NEWS.txt.

Lib/idlelib/NEWS.txt

-What's New in IDLE 3.6.0a1?
+What's New in IDLE 3.6.0?
 ===========================
-*Release date: 2017?*
+*Release date: 2016-09-??*
+
+- Issue #27117: Make colorizer htest and turtledemo work with dark themes.
+  Move code for configuring text widget colors to a new function.
+
+- Issue #24225: Rename many idlelib/*.py and idle_test/test_*.py files.
+  Edit files to replace old names with new names when the old name
+  referred to the module rather than the class it contained.
+  See the issue and IDLE section in What's New in 3.6 for more.
+
+- Issue #26673: When tk reports font size as 0, change to size 10.
+  Such fonts on Linux prevented the configuration dialog from opening.
+
+- Issue #21939: Add test for IDLE's percolator.
+  Original patch by Saimadhav Heblikar.
+
+- Issue #21676: Add test for IDLE's replace dialog.
+  Original patch by Saimadhav Heblikar.
+
+- Issue #18410: Add test for IDLE's search dialog.
+  Original patch by Westley Martínez.
+
+- Issue #21703: Add test for undo delegator.  Patch mostly by
+  Saimadhav Heblikar .
+
+- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.
+
+- Issue #23977: Add more asserts to test_delegator.
+
+- Issue #20640: Add tests for idlelib.configHelpSourceEdit.
+  Patch by Saimadhav Heblikar.
+
+- In the 'IDLE-console differences' section of the IDLE doc, clarify
+  how running with IDLE affects sys.modules and the standard streams.
+
+- Issue #25507: fix incorrect change in IOBinding that prevented printing.
+  Augment IOBinding htest to include all major IOBinding functions.
+
+- Issue #25905: Revert unwanted conversion of ' to ’ RIGHT SINGLE QUOTATION
+  MARK in README.txt and open this and NEWS.txt with 'ascii'.
+  Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'.
 
 - Issue 15348: Stop the debugger engine (normally in a user process)
   before closing the debugger window (running in the IDLE process).

Misc/NEWS

@@ -36,6 +36,36 @@ Library
 - Issue #27056: Optimize pickle.load() and pickle.loads(), up to 10% faster
   to deserialize a lot of small objects.
 
+IDLE
+----
+
+- Issue #27117: Make colorizer htest and turtledemo work with dark themes.
+  Move code for configuring text widget colors to a new function.
+
+- Issue #24225: Rename many idlelib/*.py and idle_test/test_*.py files.
+  Edit files to replace old names with new names when the old name
+  referred to the module rather than the class it contained.
+  See the issue and IDLE section in What's New in 3.6 for more.
+
+- Issue #26673: When tk reports font size as 0, change to size 10.
+  Such fonts on Linux prevented the configuration dialog from opening.
+
+- Issue #21939: Add test for IDLE's percolator.
+  Original patch by Saimadhav Heblikar.
+
+- Issue #21676: Add test for IDLE's replace dialog.
+  Original patch by Saimadhav Heblikar.
+
+- Issue #18410: Add test for IDLE's search dialog.
+  Original patch by Westley Martínez.
+
+- Issue #21703: Add test for undo delegator.  Patch mostly by
+  Saimadhav Heblikar .
+
+- Issue #27044: Add ConfigDialog.remove_var_callbacks to stop memory leaks.
+
+- Issue #23977: Add more asserts to test_delegator.
+
 Tests
 -----
 
@@ -1051,6 +1081,19 @@ Library
 IDLE
 ----
 
+- Issue #20640: Add tests for idlelib.configHelpSourceEdit.
+  Patch by Saimadhav Heblikar.
+
+- In the 'IDLE-console differences' section of the IDLE doc, clarify
+  how running with IDLE affects sys.modules and the standard streams.
+
+- Issue #25507: fix incorrect change in IOBinding that prevented printing.
+  Augment IOBinding htest to include all major IOBinding functions.
+
+- Issue #25905: Revert unwanted conversion of ' to ’ RIGHT SINGLE QUOTATION
+  MARK in README.txt and open this and NEWS.txt with 'ascii'.
+  Re-encode CREDITS.txt to utf-8 and open it with 'utf-8'.
+
 - Issue #15348: Stop the debugger engine (normally in a user process)
   before closing the debugger window (running in the IDLE process).
   This prevents the RuntimeErrors that were being caught and ignored.