Quoth Wikipedia: "Because early comic book letterers were not aware of the typographic convention of replacing a typewritten double hyphen with an em dash, the double hyphen became traditional in American comics. This practice has continued despite the development of computer lettering."
So that's where I got that from! My high school essays, printed out in thin dot-matrix grey - my earliest fanfics, too - were full of --s used where a semicolon might've been more appropriate.
So that's where I got that from! My high school essays, printed out in thin dot-matrix grey - my earliest fanfics, too - were full of --s used where a semicolon might've been more appropriate.