I did expect something like this coming ;)
Apart for locating errors, patches... line-numbers can provide various info just by sitting there, as which bookmark I see (although bookmarks aren't coded to line numbers), where in the code am I right now, how large is file, etc...
I just wanted to provide more info to Colomban
Cheers
Well, I would have to say that that experiment is irrelevant, the
Geany GUI is designed for staring at for hours at a time, in which
case you tune out the line numbers and margins unless you actually
need them :)