em dash
In the 1990s, when typing, I was simulating an EM DASH using 2 hyphens. I.e.,:
--
For example:
I wanted vanilla ice cream, but -- she wanted strawberry ice cream.
Which, with an actual EM DASH, would be:
I wanted vanilla ice cream, but — she wanted strawberry ice cream.
...
I recall using 2 hyphens to stimulate an EM DASH to be common.
@