TextEdit.setEndOfLine applies an edit and invalidates redo stack even when no change is made

[Tyriar]

Repros in 1.30.2 and 1.31.0-insiders, not 1.29.1

Repro:

1. Install Editor Config extension

2. Add .editorconfig file to root with this contents:

   root = true
   
   [*]
   end_of_line = lf
   

3. Open some file

4. Delete 2 lines

5. Save

6. Undo three times (notice that you have to undo 3 times to undo the 2 edits, this is because TextEdit.setEndOfLine caused an extra edit)

7. Save

8. Try redo, this doesn't work because TextEdit.setEndOfLine caused an edit

Related discussion:

• Undo is broken editorconfig/editorconfig-vscode#208
• Temporarily Set Configuration For Save Operation #65663

[jrieken]

Not sure what has changed, this code has been stable in the last months: https://github.com/Microsoft/vscode/blob/5aba426b77d58dbeedbc539d1780931b917cb8bb/src/vs/workbench/services/bulkEdit/electron-browser/bulkEditService.ts#L92-L104

[alexdima]

This got introduced via 0ac0c45#diff-4b2e90f9fb35dd653ba8b975c7a625f8R450

[Tyriar]

@alexandrudima thanks for the quick fix!