Issue #19020: Tkinter now uses splitlist() instead of split() in configure

methods.

diff --cc Lib/tkinter/__init__.py
Simple merge

diff --cc Misc/NEWS
index bb9c6a9f1158ce12f21ff9e40e28055d9f3c076c,eaf42fc2424220bc291bd82e76dccc0a67fe2928..bddada5427b0dd190f3f3978f4afccd09fe989b2
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -44,14 -29,12 +44,17 @@@ Core and Builtin
  Library
  -------
  
 -- Fix TypeError on "setup.py upload --show-response".
+ - Issue #19020: Tkinter now uses splitlist() instead of split() in configure
+   methods.
+ 
 +- Issue #19744: ensurepip now provides a better error message when Python is
 +  built without SSL/TLS support (pip currently requires that support to run,
 +  even if only operating with local wheel files)
 +
 +- Issue #19734: ensurepip now ignores all pip environment variables to avoid
 +  odd behaviour based on user configuration settings
  
 -- Issue #12226: HTTPS is now used by default when connecting to PyPI.
 +- Fix TypeError on "setup.py upload --show-response".
  
  - Issue #20045: Fix "setup.py register --list-classifiers".