<%= paginator.render do %>
  <nav class="text-xs-center">
    <ul class="pagination">
      <%= first_page_tag unless current_page.first? %>
      <%= prev_page_tag unless current_page.first? %>
      <% each_page do |page| %>
        <% if page.left_outer? || page.right_outer? || page.inside_window? %>
          <%= page_tag page %>
        <% end %>
      <% end %>
      <%= next_page_tag unless current_page.last? %>
      <%= last_page_tag unless current_page.last? %>
    </ul>
  </nav>
<% end %>

<%= paginator.render do %>
  <nav>
    <ul class="pagination justify-content-center">
      <%= first_page_tag unless current_page.first? %>
      <%= prev_page_tag unless current_page.first? %>
      <% each_page do |page| %>
        <% if page.left_outer? || page.right_outer? || page.inside_window? %>
          <%= page_tag page %>
        <% end %>
      <% end %>
      <%= next_page_tag unless current_page.last? %>
      <%= last_page_tag unless current_page.last? %>
    </ul>
  </nav>
<% end %>

Fix centering of pagination under bootstrap alpha6
Fix centering of pagination under bootstrap alpha6

Previously our pagination was centered, but this was broken in the
upgrade to bootstrap 4.0.0.alpha6 because text-xs-center was removed.
