NoMoreNicksLeft parent
I would use an actual em dash if there were a keyboard key for it. On my macbook, I have an an action script set up on the touchbar for emdash and a few other unicodey glyphs, but the (virtual) buttons are like 2 inches wide each so I can't fit more than 5 or 6 across it. Sucks.
On Mac emdash is option-shift-hypen (aka shift-endash, aka capital endash)
In Menlo font (Chrome on Mac's default monospace font, used for HN comments) em-dash(—) and en-dash (–) use the same glyph, though.
Double hyphen works in many places