Other editors (e.g. Kate) use the format "filename - editor name".  This is common for other applications as well (e.g. Firefox uses "page title - Mozilla Firefox"), so the request seems reasonable to me.

If you want to go the extra mile you could have an option to decide if the filename should be first or not or even a format string that would allow users to fully configure the titlebar (e.g. "{file} - IDLE {version}"), but that might be out of the scope of this issue.  FWIW I don't think Kate has an option for that, but it has one to show the full path in titlebar.

(@bagrat: assuming your email address is correct, if you are not getting notifications they might have ended up in the spam folder.)