By the way, 'em' stands for 'editor for mortals' - I christened it that after Ken Thompson visited our lab at QMC while I was developing it and said something like: "yeah, I've seen editors like that, but I don't feel a need for them, I don't want to see the state of the file when I'm editing".
Hmm, wow, and now I suddenly remembered - I wrote a wisiwig editor when I found out that something like ed (for our machines) was too stupid, with all these buttons to remember. Of course, I had to update the terminal driver as well...
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Кен суровый программер, однако! 😀
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