blinry - I also learned that the "grep" command is called like that because it performs the same function as running "g/re/p" in the original editor "ed" (and "QED" before that, I think): It gets all lines from a file that match the regular expression "re", and prints them!

And through that same heritage, :g/re/p still works in my Neovim today! ^_^ I love learning stuff like this!~