zlacker

>>tkgall+(OP)
I suspect they are generated via "autocorrect", the same way as "smart (more like stupid) quotes" and other characters that tend to cause a great deal of frustration should they find their way into source code. It would be interesting to see how many users regularly make posts containing non-ASCII characters.

>>userbi+p2
I type them manually out of habit. There are a handful of other common non-ASCII marks I have muscle memory for as well.

Compose-minus-minus-minus in X

It's one of the long-press punctuation marks on Android

Option-shift-minus on Mac