anchor.diff:        </button>
         <a class="text-brand navbar-brand" href="<%= root_path %>">
           <span class="brand">
  -          <% if user_signed_in? %>
  -            <span class="icon icon-logo-filled"></span>
  -          <% else %>
  -            <span class="icon icon-logo"></span>
  +          <span class="icon icon-logo-filled"></span>
  +          <% if !user_signed_in? %>
               Assembly
             <% end %>
           </span>
  
positive.code: <div class="navbar
    <% if Rails.env.development? %>
      devbar
    <% end %>
  
    <% if user_signed_in? %>
      navbar-inverse
    <% else %>
      navbar-default
    <% end %>
    navbar-static-top" data-headroom data-tolerance="5" data-offset="205" data-classes="{"initial":"animated","pinned":"slideDown","unpinned":"slideUp","top":"headroom--top","notTop":"headroom--not-top"}">
    <div class="container-fluid">
  
      <div class="navbar-header">
  
negative.code: 
      <div class="collapse navbar-collapse" id="platform-navbar-collapse">
  
        <% if user_signed_in? %>
          <form action="<%= scoped_search_path %>" class="navbar-form navbar-left" style="<% if user_signed_in? %>padding-left: 4px;<% end %>">
            <div class="form-group">
              <input type="text" name="q" value="<%= params[:q] %>" class="form-control" autocomplete="off"
                placeholder="<%= @product ? "Search #{@product.name}…" : "Search…" %>"  />
              <input type="hidden" name="type" value="<%= @type %>">
            </div>
            <!-- <button type="submit" class="btn btn-default">Search</button> -->
          </form>
        <% end %>
  
        <ul class="nav navbar-nav">
  
  