title: Aligning text box and button, bootstrap
body: <p>I've had the following issue occur with a bootstrap-styled text field and input button many times. Notice that they are not vertically aligned:</p>
  
  <p><img src="https://i.stack.imgur.com/h6nvi.png" alt="enter image description here"></p>
  
  <p>How do I align these two elements? Here is the HTML:</p>
  
  <pre><code>&lt;div class="span6"&gt;
      &lt;input type="text" placeholder="email"&gt; &lt;button type="button" class="btn btn-info"&gt;Sign up&lt;/button&gt;
  &lt;/div&gt;
  </code></pre>