title: Image inside div has extra space below the image
body: <p>Why in the <a href="http://jsfiddle.net/BZeLR/4/" rel="noreferrer">following code</a> the height of the <code>div</code> is bigger than the height of the <code>img</code> ? There is a gap below the image, but it doesn't seems to be a padding/margin. </p>
  
  <p><strong>What is the gap or extra space below image?</strong></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#wrapper {
    border: 1px solid red;
    width:200px;
  }
  img {
    width:200px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="wrapper"&gt;
    &lt;img src="http://i.imgur.com/RECDV24.jpg" /&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p><img src="https://i.stack.imgur.com/iR7E8.jpg" alt="Image with a gap or white space under it"></p>