message: Continue readline loop when a empty command is entered
  Fixes
diff: @@ -291,7 +291,9 @@ fn main() -> Result<()> {
  loop {
  match rl.readline(PROMPT) {
  Ok(line) => {
  - if line.trim() == "help" {
  + if line.trim().is_empty() {
  + continue;
  + } else if line.trim() == "help" {
  println!("{}", help());
  } else if let Some(response) = run_cmd(&line, &stream)? {
  rl.add_history_entry(line);
  