Terminal applications have a “cursor” that they can move around, just like a text editor. You can tell that cursor “go to line 3, delete everything, then print out this new text” by using VT100 sequences. And you can use it to replace existing characters with new ones, without re-emitting a whole line.
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full. append again has to allocate a new backing store, this time
Samsung Galaxy S26+ (Verizon, 256GB)
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