app/views/activities/_activities_list.html.erb

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<div id="activities-pagination"><%= paginate activities, :remote => true, params: (local_assigns[:paginate_params] || {}) %></div>
<ul id="activities-list" class="list activities-list">
    <% unless activities.empty? %>
      <% activities.each do |activity| %>
        <%= render_activity activity, @user %>
      <% end %>
    <% else %>
      <% if @user %>
        <p class="empty"><%= t 'activities.empty', {name: @user.name} %></p>
      <% else %>
        <p class="empty"><%= t 'news_feed.empty' %></p>
      <% end %>
    <% end %>
</ul>