title: Using sed to remove a block of text
body: <p>I have a block of text that looks like this:</p>
  
  <pre><code>    &lt;!-- BOF CLEAN --&gt;
  ... a bunch of stuff 
      &lt;!-- EOF CLEAN --&gt;
  </code></pre>
  
  <p>I'd like to remove this entire block.  What's the sed command? </p>