Hah -- never used Notepad++ all that much. Nice app, but no linux build.
But a text editor has far less to track than a document editor. Anyway -- it is still the kind of thing that someone needs to focus on, which is less likely when only one or two people work on said program, have many things to focus on, and no one ever complained loudly enough.
I am therefore not terribly surprised by any software that doesn't have this (excepting business-class and its competition, or software manned by said ranks
). Would be a nice feature, of course.