docs: Fix copy paste error in example
@@ -12,6 +12,6 @@ fn main() {
// Note, it's safe to call unwrap() because the arg is required
let port: usize = matches
.value_of_t("PORT")
- .expect("'MODE' is required and parsing will fail if its missing");
+ .expect("'PORT' is required and parsing will fail if its missing");
println!("PORT = {}", port);
}
