title: Use sed with a special char inside string
body: <p>I have a special char "&amp;" in a string, how can use sed?
  Space before symbol <code>&amp;</code> is the issue.</p>
  
  <pre><code>word="Word"
  str="Word: One \\&amp; Three" 
  echo "$str" | sed -e 's/'$word'.*/'$str'/g' 
  </code></pre>