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Thinking about esoteric programming languages inspired me to imagine...esoteric text editors!

If you can say "a programming language that [insert some interesting thing]" you can do the same with text editors, right?

A couple I thought of:

A text editor that will only write a file to an *existing* file whose contents are very different from the one being edited. I'd call it Clobber.

A text editor that will save every file as an image -- take, say, the UTF-8 representation of the text, and take 3-byte sequences at a time to write pixels of an image.

A text editor that will only save a file if the alphabetical text can be interpreted as a sequence of chemical element abbreviations. So it would save "tick" -- titanium, carbon, potassium -- but if the file had "hello" it wouldn't because there's no way to represent the Ls.