Hi! A suggestion (nothing urgent or important): accept tab characters CHR$(9) in source code while loading, and either replace them with spaces (historically a tab every 8 columns, modern version is rather 4 columns).
Currently list shows tab as a small circle which is not great visually
I use external text/source code editors to edit large source files, and they tend to insert tabs (Ok, I can reconfigure them, but I'd prefer keep tabs in the general case)