Steps to replicate:
- Create a new cell
- Copy any code content from assets or another cell
- Paste that code in newly created cell
- click on toggle edit button
Extra lines will be added to code in non editable mode as seen in below screen shots
editable mode

non editable mode

Also the line numbers are misaligned in non editable mode. This issue is reproducible on RCloud-2, RCloud-5 instances only