And one small not-so-beautiful trick more: replace — - to - - (well, that is not right either) because then you should could (is that even english 
) save skin of Apple users, I reckon. At least i-devices will use — everywhere no matter if em-dash is disabled on side of Dsicourse.
Honestly said — I’ve never done that, but because I have to use copy&paste, thanks to Apple, for same reason, and it works then should replacing work same way if there is need to save em-dash.
There was some easier trick to achieve same, but I can’t remember what it was and who guided me… I whined same thing, but for me the reason was markdown tables.