title: String attribute values in multiple lines, HTML
body: <p>Is it possible, in HTML to write something like:</p>
  
  <pre><code>&lt;a href="bla bla bla bla\
          bla bla bla bla"&gt;....&lt;/a&gt;
  </code></pre>
  
  <p>The idea is splitting a string attribute in different lines to improve readability.</p>