title: If there exists a dot after ".com", is it a valid URL?
body: <p>I came across a few URLs which also render with or without a dot/period after <code>.com</code>, while some do not.</p>
  
  <p>For example: </p>
  
  <pre><code>www.example.com.
  </code></pre>
  
  <p>Should the URL render normally if a dot/period is added after <code>.com</code> or should it go to a 404 page?</p>