Hi Antonis,
After using HiEditor for quite a while, I thought if it could be possible to slightly increase the space between text and the line numbers bar (see image, I added 5 pixels there which might be a little much, but so it is more obvious what I mean).
IMO currently the text looks a little bit 'squished' against the line numbers bar.
I admit this might be nitpicking, but I think at least 2-3 pixels added would look a bit better than currently.
Attached Image