title: vim: search and replace for "&"
body: <p>In order to replace each occurrence of "&amp;" to "&amp;&amp;" in the range from the current line to 30 more lines on, I issue <code>:.,+30s/\\&amp;/\\&amp;\\&amp;/g</code> but Vim says "Pattern not found". I'm escaping the special character "&amp;" by double backslash "\".</p>