title: Whitespace concatenation in Bash
body: <p>The problem is simple. </p>
  
  <pre><code>for i in `seq $begin $progress_length` ; do
    progress_bar=$progress_bar'#'
  done
  
  for i in `seq $middle $end` ; do
    empty_space=$empty_space' '
  done
  </code></pre>
  
  <p>I need <code>empty_space</code> to position content after the progress bar. I've expected that it will be string of x whitespaces. But finally string is empty. How may I create string of x whitespaces?</p>