Issue #15308: Add 'interrupt execution' (^C) to Shell menu.
Patch by Roger Serwy, updated by Bayard Randel.
diff --git a/Lib/idlelib/Bindings.py b/Lib/idlelib/Bindings.py
index 862e6ab..2fd8532 100644
--- a/Lib/idlelib/Bindings.py
+++ b/Lib/idlelib/Bindings.py
@@ -67,6 +67,8 @@
  ('shell', [
    ('_View Last Restart', '<<view-restart>>'),
    ('_Restart Shell', '<<restart-shell>>'),
+   None,
+   ('_Interrupt Execution', '<<interrupt-execution>>'),
    ]),
  ('debug', [
    ('_Go to File/Line', '<<goto-file-line>>'),