Assume that the user knows when he wants to end the line; don't insert
something he didn't select or complete.
diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index 7085386..e1549be 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -27,7 +27,7 @@
 
     menudefs = [
         ('edit', [
-            ("Show completions", "<<force-open-completions>>"),
+            ("Show Completions", "<<force-open-completions>>"),
         ])
     ]