That’s an en-dash – and I use those myself. (I’ve experimented with em-dashes—brefly—but it doesn’t look good to my eye in English.)

It’s all by the vibes, I don’t have any concrete proof. FWIW, the comment seems at least hand-edited, so maybe it’s just this “the [A] is the [B]” trope that has triggered me. If the rest of it is readable, then I apologize, but still: that’s a bad title, please don’t use this – unless you’re writing a LinkedIn post.

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Edit: here’s another LLMism example from another HN user: https://news.ycombinator.com/item?id=49996255

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rendleflag 3 hours ago | parent [-]

I always get en and em confused. They are all just dashes to me :-).

The "Nothing else: no lists, tables, links, quotes, images or rules" is from the docs indicating that these things are not supported.

	▲	xoxxala 43 minutes ago \| parent \| next [-]
		I, too, was confused for the longest time, but the secret is in the names. En dash is the width of an “n”. Em dash is the width of an “M”, so a little wider.
	▲	notpushkin 3 hours ago \| parent \| prev [-]
		> I always get en and em confused Yeah, it’s somewhat a typography-nerdy thing :–) (gosh that looks terrible probably; edit: actually it’s surprisingly fine) > indicating that these things are not supported Of course, but it does sound a bit unnatural IMO. Then again, I’m going by the vibes here.