🐞 DelegatedUndoManager undo groups not working as expected #68

Description

DelegatedUndoManager does not override

func beginUndoGrouping()
func endUndoGrouping()

so calling

textView.undoManager?.beginUndoGrouping()

here and here does not undo as group as expected.

To Reproduce

1. Open CodeEditSourceEditorExample.xcodeproj (to get access to multi-line actions
2. Select multiple lines
3. Press Tab, Shift Tab, or CMD+/ to do a multi-line action
4. Click undo or CMD-z
   See that one line at a time is undone

Expected Behavior

The entire multi line action should be undone at once.

Version Information

CodeEditTextView: main
macOS: 15.2 (24C101)
Xcode: Version 16.1 (16B40)

Additional Context

No response

Screenshots