Now this little exposition about dashes contains just the sort of nitpicky detail that fascinates me. I particularly like knowing how to use an en dash in certain compound adjectives. Now I can have top-notch-letter-perfect descriptors :-)
[via Coudal Fresh Signals]
Update: Except that apparently the HTML endash tag is just a big fat lie, which kind of ruins my oh-so-clever example. Pbbbbt.