To your edit: i wouldn't recommend, the EM dash should generally be used without surrounding spaces. It is dimensioned to set a proper pause in the text and wi

To your edit: i wouldn't recommend, the EM dash should generally be used without surrounding spaces. It is dimensioned to set a proper pause in the text and will rip holes in your text body if surrounded by so much additional white space. You also wouldn't put a space before a period . (Use an EN dash with spaces, if you must)