Removing last char from command line.

Last char is EOF char.

src/main.rs

@@ -103,6 +103,7 @@ fn perform_encode_from_io(k: u8, n: u8) -> io::Result<()> {
                                         Some(format!("My limit is at {} bytes.", limit))));
             }
         }
+        tmp.pop();
 		tmp
     };
 	match lib::generate_shares(k, n, secret) {