Jumbotron documentation example is wrong

Created by: eahutchins

In http://getbootstrap.com/components/#jumbotron, the jumbotron should be nested in the container:

<div class="container">
  <div class="jumbotron">
    <h1>Hello, world!</h1>
    <p>...</p>
    <p><a class="btn btn-primary btn-lg">Learn more</a></p>
  </div>
</div>

(at least I get a full-width jumbotron in my app if I don't nest it like that)