Comment by vonunov

The em dash (at least from an American perspective) is the "regular dash". Referring constantly to the "em dash" is a new thing; in my experience, it used to be understood that "dash" by default referred to the function/role of the punctuation mark that in America we format as an em dash, and that in the UK they (mostly) format as a spaced en dash. You have that function formatted as a hyphen: a dash in the abstract but not typographically.