So deep your comment. Asking for a friend, how did you manage to have the em dash — in your keyboard ?
Em dashes are used often by LLMs, because humans use them often. On mac keyboards its easily typed. I know this is oversimplifying the situation, but I don't see the usefulness of the constant witch-hunting for allegedly LLM-generated text. For text we are long beyond the point, where we can differenciate between human generated and machine generated. We're even at the point, where it gets somewhat hard to identify machine generated audio and visuals.
On a Mac, it's alt-dash in case you weren't being facetious
On Windows it is Alt+0151. Harder to use than on Mac but definitely possible, I frequently use it.
On recent versions Shift+Win+- also work, and Win+- produces en dash.
I just type -- and jira fixes it.
I really despise that people like you ruined em dashes for the rest of us who have enjoyed using them.
I use Compose - - - on Linux and my cellphone (Unexpected Keyboard). Mac is Alt-_.
Does your friend have an iPhone? The default iOS keyboard has automatically converted double dashes into an emdash for at least seven years now.