I Love the Em Dash–Too Bad If AI Does Too
https://thewalrus.ca/i-love-the-em-dash-too-bad-if-ai-does-too/
I Love the Em Dash–Too Bad If AI Does Too
https://thewalrus.ca/i-love-the-em-dash-too-bad-if-ai-does-too/
Or British English.
The Oxford style guide page 18 https://www.ox.ac.uk/public-affairs/style-guide
> m-dash (—)
> Do not use; use an n-dash instead.
> n-dash (–)
> Use in a pair in place of round brackets or commas, surrounded by spaces.
I feel a number of people online started using something like the "British style", as an ascii hyphen is closer to an n-dash than an m-dash in width. And then without spaces either side looks very squished.