title: Using sed to replace tab with spaces
body: <p>I'm trying to replace the tab with 4 spaces, using sed, but it is not working.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>sed -i '{s/\t/ \{4\}/g}' filename
  </code></pre>
  
  <p>Any suggestion is appreciate.</p>