I think you should get just that with Notepad++ on Windows or TextWrangler (BBedit) on Mac. On Linux I think that all stock editors have it (GEdit, etc…). All that for free and without Electron madness. You should be much better with any of them.

TextWrangler was my goto before Atom and I do prefer the look of the latter.

SciTE is pretty good in that role.

https://www.scintilla.org/SciTE.html

If you use windows, notepad++ is what you're looking for. It was my first love in terms of code editors, and I still haven't found an editor (besides vim, and probably emacs) that handles on-the-fly macro recording and playback like NPP has for decades.