title: Search and replace across multiple lines with conversion to lower case in Vim
body: <p>Here's what I'd like to do, for each one of many files:</p>
  
  <ul>
  <li>search for all occurrences of <code>&lt;a href</code> then begin block selection</li>
  <li>select until the first occurrence of <code>&gt;</code></li>
  <li>convert the entire match to lowercase</li>
  </ul>