Issue #15861: tkinter now correctly works with lists and tuples containing

strings with whitespaces, backslashes or unbalanced braces.

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

diff --cc Misc/NEWS
index 51c9886fcda46aeca170f26e6f218eced3c0e5fa,16256fe9fa3633fe9d9a0a57b7f2a286f83bcbcd..bf1c2cad72c122c961e1926c70e4a84d518e5d37
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -220,6 -150,11 +220,9 @@@ Core and Builtin
  Library
  -------
  
 -- Issue #10527: Use poll() instead of select() for multiprocessing pipes.
 -
+ - Issue #15861: tkinter now correctly works with lists and tuples containing
+   strings with whitespaces, backslashes or unbalanced braces.
+ 
  - Issue #9720: zipfile now writes correct local headers for files larger than
    4 GiB.