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-rw-r--r--Tools/idle/EditorWindow.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Tools/idle/EditorWindow.py b/Tools/idle/EditorWindow.py
index 2ae69cfa8a..8b6a0b405c 100644
--- a/Tools/idle/EditorWindow.py
+++ b/Tools/idle/EditorWindow.py
@@ -147,6 +147,8 @@ class EditorWindow:
self.undo = undo = self.UndoDelegator(); per.insertfilter(undo)
self.io = io = self.IOBinding(self)
+ text.undo_block_start = undo.undo_block_start
+ text.undo_block_stop = undo.undo_block_stop
undo.set_saved_change_hook(self.saved_change_hook)
io.set_filename_change_hook(self.filename_change_hook)