libdelimit: updates to make API easier to use; fop(1): updated to new libdelimit API

src/fop.rs

@@ -94,7 +94,7 @@ fn main() -> ExitCode {
 
 	let stdin = stdin().lock();
 
-	let mut input = Delimited::new(stdin, d.clone().as_bytes());
+	let mut input = Delimited::new(stdin, d.clone());
 	let mut n = 0;
 
 	let mut fopped = false;
@@ -104,7 +104,7 @@ fn main() -> ExitCode {
 			Ok(v) => v,
 			Err(e) => {
 				err(&argv[0], e);
-				exit(EX_IOERR.into());
+				return EX_IOERR.into();
 			},
 		};