rename time helper to ago

app/views/forums/show.html.erb

@@ -13,7 +13,7 @@
         <%= link_to(thread.author.avatar(64), thread.author, title: thread.author.ign) %>
         <%= render partial: "users/username", locals: { user: thread.author } %>
         <%= link_to thread do %>
-          <%= time thread.created_at %>
+          <%= ago thread.created_at %>
         <% end %>
         <span class="comment-counter">
           <%= link_to pluralize(thread.replies.count, "Reply"), thread %>
@@ -27,7 +27,7 @@
             <% if rpl = thread.replies.last %>
               <%= rpl.author.name %>
               <%= link_to "replied", forumthread_path(thread) + "#reply-#{rpl.id}" %>
-              <%= time rpl.created_at %>.
+              <%= ago rpl.created_at %>.
             <% else %>
               No replies yet.
             <% end %>