title: How do I make xxd -r work with the output of xxd -i?
body: <p>Can some propose a workaround for this bug:</p>
  
  <pre><code>cat /bin/ls |xxd -g 1 -i | xxd -r
  xxd: sorry, cannot seek backwards.
  </code></pre>
  
  <p>But if you do:</p>
  
  <pre><code>cat /bin/ls |xxd -g 1 | xxd -r
  </code></pre>
  
  <p>It is ok.   Is this a bug?</p>
  
  <p>In the past I was able to execute this, but now I am just wondering if any alternatives exists?</p>