Comment by legrande

Another (esoteric) editor I use for quick and dirty hacks on Windows is Notepad2[0]. It's a bare-bones drop-in replacement for the default notepad.exe on Windows, and has syntax highlighting.

As for Linux, Pluma[1] is great too.

[0] https://www.flos-freeware.ch/notepad2.html

[1] https://community.linuxmint.com/software/view/pluma