Mdash & ellipsis

When I type three periods in a row or three minus signs in code mirror on iOS safari it converts them to an ellipsis or an mdash.

Is there a setting to tell safari not to do that. Safari on desktop doesn’t exhibit the same behavior.

If this is Safari’s native behavior and not ProseMirror input rules (which it sounds like if it’s not happening on desktop), I don’t think there’s any way to disable that.