1.9 fix for changes to #to_s. By Sam Ruby. [#3228 state:resolved]

actionpack/lib/action_dispatch/middleware/templates/rescues/_trace.erb

@@ -15,12 +15,12 @@
       show = "document.getElementById('#{name.gsub /\s/, '-'}').style.display='block';"
       hide = (names - [name]).collect {|hide_name| "document.getElementById('#{hide_name.gsub /\s/, '-'}').style.display='none';"}
     %>
-    <a href="#" onclick="<%= hide %><%= show %>; return false;"><%= name %></a> <%= '|' unless names.last == name %>
+    <a href="#" onclick="<%= hide.join %><%= show %>; return false;"><%= name %></a> <%= '|' unless names.last == name %>
   <% end %>
 
   <% traces.each do |name, trace| %>
     <div id="<%= name.gsub /\s/, '-' %>" style="display: <%= name == "Application Trace" ? 'block' : 'none' %>;">
-      <pre><code><%= trace.join "\n" %></code></pre>
+      <pre><code><%=h trace.join "\n" %></code></pre>
     </div>
   <% end %>
 </div>