How to do an em-dash in QMK and ZMK keyboard firmware

It&rsquo;s time to reclaim the em-dash. A common refrain is that the use of an em-dash in writing is a clear sign sign that it was written by an AI (or an LLM). This kills me. Up until really very recently, the use of an em-dash in writing was a clear sign that someone knew how to use punctuation (as was the use of a semi-colon). I have always been a big user of em-dashes, mostly for parenthetical…