Technically, in latex (and what other format is there?) an en-dash is `--` and an em-dash is `---`. So that was just an em-dash. A `-` is a hyphen.
replyUs oldies learnt to type these with multiple dashes automatically, as unicode hadn't been invented yet.
This arms race leading, somewhat inevitably, to the development of the eminem-dash.
reply-- - --
----- .---- ----- ----- .---- ----- ----- ----- ....... ----- .---- .---- ----- .---- .---- ----- .---- ....... ----- .---- .---- ----- .---- .---- ----- .----
replyHahahaha nice.
reply...._ .. ...._ ``````‾ ••••••—
replyThe Darude-Sandstorm dash