Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: kujirahand

tests/theme/ttk_button.py

@@ -13,6 +13,6 @@
 for event, values in window.event_iter():
     if event == "Modern":
         eg.popup("You clicked the modern button!")
-    if event == "Classic":
+    elif event == "Classic":
         eg.popup("You clicked the classic button!")
 window.close()