Mind Your En And Em Dashes: Typographic Etiquette
smashingmagazine.com
smashingmagazine.com
Does it really matter how many spaces after a dot one uses, or if dash is really a dash or just two hyphens[1], or how paragraphs are handled? No! Nobody will even notice!
Work on actually getting things done, not adhering to the standard this rag of a publication mindlessly pushes.
[1] As it has been done since the dawn of computing.
Just because you might not doesn't mean everybody won't.