[Python-checkins] bpo-42560: add warning to Tkinter docs about outdated pre-8.5 documentation online (GH-27836)

[ambv]

https://github.com/python/cpython/commit/1eb451031a64b4f28d737ee7f394252ae9a76118
commit: 1eb451031a64b4f28d737ee7f394252ae9a76118
branch: main
author: Mark Roseman <mark at markroseman.com>
committer: ambv <lukasz at langa.pl>
date: 2021-08-23T21:00:47+02:00
summary:

bpo-42560: add warning to Tkinter docs about outdated pre-8.5 documentation online (GH-27836)

Co-authored-by: Łukasz Langa <lukasz at langa.pl>
Co-authored-by: E-Paine <63801254+E-Paine at users.noreply.github.com>

files:
M Doc/library/tkinter.rst

diff --git a/Doc/library/tkinter.rst b/Doc/library/tkinter.rst
index 425f030dcc983..c106cb8328c20 100644
--- a/Doc/library/tkinter.rst
+++ b/Doc/library/tkinter.rst
@@ -29,6 +29,13 @@ make the experience more pythonic. This documentation will concentrate on these
 additions and changes, and refer to the official Tcl/Tk documentation for
 details that are unchanged.
 
+.. note::
+
+   Tcl/Tk 8.5 (2007) introduced a modern set of themed user interface components
+   along with a new API to use them. Both old and new APIs are still available.
+   Most documentation you will find online still uses the old API and
+   can be woefully outdated.
+
 .. seealso::
 
    * `TkDocs <http://tkdocs.com/>`_