title: What are the valid attributes separators in Hypertext Markup Language?
body: <p><strong>I.E:</strong> </p>
  
  <ul>
  <li><code>&lt;a href="foo.com" class="bar"&gt;</code></li>
  <li><code>&lt;a/href="foo.com"/class="bar"&gt;</code></li>
  </ul>
  
  <p><strong>Space</strong> and <strong>/</strong> are two valid separator between <code>href</code> and <code>class</code>.</p>
  
  <ul>
  <li><strong>In which RFC is this defined?</strong></li>
  <li><strong>What are the other valid attributes separators?</strong></li>
  </ul>
  
  <p>Sample: <a href="https://jsfiddle.net/yeg58qun/" rel="nofollow noreferrer">https://jsfiddle.net/yeg58qun/</a></p>