Line numbers make an editor look cool, but their practical utility is near zero — no one uses them for anything except perhaps when dealing with bug reports. They do consume precious screen real estate, especially in vertical mode, and I can see less code because of them.
I'd like to see a preferences option to keep them permanently turned off, so that I can see more code on screen. An option, so that we could switch them on sometimes if needed.
PS: I *love* Textastic!
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