Yeah but a dash, at least on my keyboard is a '-', not the one quoted above.
As a Swedish native it really breaks my reading of an English word, but apparently it's supposed to indicate that you should pronounce each "o" separately. Language is fun.
It's just confusing for us poor Swedes since "ö" in Swedish is a separate letter with its own pronunciation, and not a somehow-modified "o". Always takes an extra couple of seconds to remember how "Motörhead" is supposed to be said. :)
https://www.grammarly.com/blog/punctuation-capitalization/da...