Issue #6639: Module-level turtle functions no longer raise TclError after

closing the window.

diff --cc Lib/turtledemo/__main__.py
index 6280c8497b61d44fb0c47b27315b57e001d98be7,106d058808993a7580d4fd1c794932dd94d7ae37..106d058808993a7580d4fd1c794932dd94d7ae37
mode 100755,100755..100644
--- 1/Lib/turtledemo/__main__.py
--- 2/Lib/turtledemo/__main__.py
+++ b/Lib/turtledemo/__main__.py

diff --cc Misc/NEWS
index ad03e0a7e49272a575f2f5d3ebc68fed2a00de0c,826eab109d565c74cb1e6d3ff5ecb0d63069fbc9..3bc6a676d04f26f317cca8fa18840028c06f60e0
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -13,8 -13,12 +13,11 @@@ Core and Builtin
  Library
  -------
  
 -- Issues #814253, #9179: Warnings now are raised when group references and
 -  conditional group references are used in lookbehind assertions in regular
 -  expressions.
+ - Issue #6639: Module-level turtle functions no longer raise TclError after
+   closing the window.
+ 
 +- Issues #814253, #9179: Group references and conditional group references now
 +  work in lookbehind assertions in regular expressions.
  
  - Issue #23215: Multibyte codecs with custom error handlers that ignores errors
    consumed too much memory and raised SystemError or MemoryError.