anchor.diff:      <ul class="list-unstyled px-3">
         <li>
           <%= link_to root_path, class: "d-flex justify-content-between py-2" do %>
  -          <div class="c-sidebar__icon text-muted">
  +          <div class="c-sidebar__icon mr-1 text-center text-muted">
               <i class="fal fa-home"></i>
             </div>
   
  
positive.code:       ].each do |link_path, icon_name, link_text| %>
          <li>
            <%= link_to link_path, class: "d-flex justify-content-between py-2" do %>
              <div class="c-sidebar__icon text-muted">
                <i class="fal fa-<%= icon_name %>"></i>
              </div>
  
  
negative.code:         ].each do |status_kind, icon_name, link_text| %>
            <li>
              <%= link_to library_path(username: user.username, status_kind: status_kind), class: "d-flex justify-content-between py-2" do %>
                <div class="c-sidebar__icon mr-1 text-center text-muted">
                  <i class="fal fa-<%= icon_name %>"></i>
                </div>
  
  