title: Is it correct to use single quotes for HTML attributes?
body: <p>Recently I've been seeing a lot of this:</p>
  
  <pre><code>&lt;a href='http://widget-site-example.com/example.html'&gt;
      &lt;img src='http://widget-site-example.com/ross.jpg' alt='Ross&amp;#39;s Widget' /&gt;
  &lt;/a&gt;
  </code></pre>
  
  <p>Is it valid to use single quotes in HTML? As I've highlighted above it's also problematic because you have to escape apostrophes.</p>