Submitted by Our Languages blog on June 4, 2018, at 13:34
You’re right about the uses of the hyphen, en dash and em dash. For more information, see our article entitled "Hyphens and Dashes—The Long and the Short of It" (http://www.btb.termiumplus.gc.ca/tpv2guides/guides/pep/index-eng.html?la...).
As for the spaced en dash, it does seem to create a more visible separation between the two parts of the sentence. And you’re in good company in preferring it, as the quotation from Robert Bringhurst shows!