message: Ignore lines starting with # in batch files
  Also ignore blank lines
diff: @@ -157,6 +157,12 @@ fn _iter_batch<T>(command_executor: CommandExecutor, reader: T) where T: std::io
  let line = if let Ok(line) = line { line } else {
  return println_err!("Can't parse line #{}", line_num);
  };
  +
  + if line.starts_with("#") || line.is_empty() {
  + // Skip blank lines and lines starting with #
  + continue;
  + }
  +
  println!("{}", line);
  let (line, force) = if line.starts_with("-") {
  (line[1..].as_ref(), true)
  