Add tkinter._test

AlexWaygood · web-flow · commit dbc7c7be22a5 · 2022-06-12T14:41:34.000+01:00
Fixes #7903
diff --git a/stdlib/tkinter/__init__.pyi b/stdlib/tkinter/__init__.pyi
@@ -3576,3 +3576,5 @@ class PanedWindow(Widget):
     def paneconfigure(self, tagOrId, cnf: Any | None = ..., **kw): ...
     paneconfig: Any
     def panes(self): ...
+
+def _test() -> None: ...
