I'm sure someone with a favorite text editor could tell you, I'm not a programmer and I just use Notepad, heh.

Many text editors offer (advanced) features to faster edit text. A classic example is vim, which has a mode in which you navigate a document very fast with your keyboard, meaning no mouse or arrow key spam.
It also allows you to edit multiple things at once, search for stuff in different ways, and also install plugins. Those can be very useful, like continuously checking if you messed up your program.