blog/themes/chameleon/layout/_partial/post/nav.ejs

<% if (post.prev || post.next) { %>
<nav id="article-nav" class="article-nav">
  <span class="article-nav-link-wrap newer">
    <% if (post.prev) { %>
    <strong><%= __('newer') %></strong>
    <a href="<%- url_for(post.prev.path) %>">
      <div class="article-nav-title">
      <% if (post.prev.title) { %>
        <%= post.prev.title %>
      <% } else { %>
        (no title)
      <% } %>
      </div>
    </a>
    <% } %>
  </span>
  <span class="article-nav-link-wrap older">
    <% if (post.next) { %>
    <strong><%= __('older') %></strong>
    <a href="<%- url_for(post.next.path) %>">
      <div class="article-nav-title"><%= post.next.title %></div>
    </a>
    <% } %>
  </span>
</nav>
<% } %>