app/views/application/_navbar.html.erb
<nav class="navbar navbar-default navbar-static-top">
<div class="container">
<div class='row'>
<div class='col-md-8 col-md-offset-2'>
<div class="navbar-header">
<%= link_to 'Writefully', root_path, class: 'navbar-brand' %>
</div>
<ul class='nav navbar-nav navbar-right'>
<%= render_user_auth_nav %>
</ul>
</div>
</div>
</div>
</nav>