bpo-17535: IDLE editor line numbers (GH-14030)


diff --git a/Lib/idlelib/pyshell.py b/Lib/idlelib/pyshell.py
index 7ad5a76..87401f3 100755
--- a/Lib/idlelib/pyshell.py
+++ b/Lib/idlelib/pyshell.py
@@ -861,6 +861,8 @@
         ("Squeeze", "<<squeeze-current-text>>"),
     ]
 
+    allow_line_numbers = False
+
     # New classes
     from idlelib.history import History