title: Bootstrap: a buttons allowed inside navbar
body: <p>In <a href="http://getbootstrap.com/css/#callout-buttons-context-usage" rel="nofollow">Bootstrap documentation</a> says:</p>
  
  <blockquote>
    <p>While button classes can be used on <code>&lt;a&gt;</code> and <code>&lt;button&gt;</code> elements, only
    <code>&lt;button&gt;</code> elements are supported within our nav and navbar components.</p>
  </blockquote>
  
  <p>I don't know if I'm misunderstanding something, but I can use <code>&lt;a&gt;</code> links within nav components (already doing it). So, what does that paragraph mean?</p>