Update idlelib/NEWS.txt.

diff --cc Lib/idlelib/NEWS.txt
index 231d20efadc636a1d3b9bb755a8e95912750718f,a3a8fbf12b7b4658ce426aee36e5b51f454b86ff..828142c5b488d6653b99663394903d437b7f0059
--- 1/Lib/idlelib/NEWS.txt
--- 2/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@@ -1,6 -1,30 +1,26 @@@
 -What's New in Idle 3.4.3?
 +What's New in IDLE 3.5.0?
  =========================
  
 -
 -What's New in IDLE 3.4.2?
 -=========================
 -
+ - Issue #16893: Update Idle doc chapter to match current Idle and add new
+   information.
+ 
+ - Issue #3068: Add Idle extension configuration dialog to Options menu.
+   Changes are written to HOME/.idlerc/config-extensions.cfg.
+   Original patch by Tal Einat.
+ 
+ - Issue #16233: A module browser (File : Class Browser, Alt+C) requires a
+   editor window with a filename.  When Class Browser is requested otherwise,
+   from a shell, output window, or 'Untitled' editor, Idle no longer displays
+   an error box.  It now pops up an  Open Module box (Alt+M). If a valid name
+   is entered and a module is opened, a corresponding browser is also opened.
+ 
+ - Issue #4832: Save As to type Python files automatically adds .py to the
+   name you enter (even if your system does not display it).  Some systems
+   automatically add .txt when type is Text files.
+ 
+ - Issue #21986: Code objects are not normally pickled by the pickle module.
+   To match this, they are no longer pickled when running under Idle.
+ 
  - Issue #17390: Adjust Editor window title; remove 'Python',
    move version to end.