add_known_included_in_and_extening.diff

diff --git a/templates/default/module/html/box_info.erb b/templates/default/module/html/box_info.erb
index e436984..49a0b48 100644
--- a/templates/default/module/html/box_info.erb
+++ b/templates/default/module/html/box_info.erb
@@ -23,6 +23,13 @@
       <% n = n == 2 ? 1 : 2 %>
     <% end %>
   <% end %>
+  <% [[:class, "Extending"], [:instance, "Included in"]].each do |scope, name| %>
+    <% if (mixed_into = mixed_into(object, scope)).size > 0 %>
+      <dt class="r<%=n%>"><%= name %>:</dt>
+      <dd class="r<%=n%>"><%= mixed_into.sort_by {|o| o.path }.map {|o| linkify(o) }.join(", ") %></dd>
+      <% n = n == 2 ? 1 : 2 %>
+    <% end %>
+  <% end %>
   <% unless object.root? %>
     <dt class="r<%=n%> last">Defined in:</dt>
     <dd class="r<%=n%> last"><%= erb(:defines) %></dd>
diff --git a/templates/default/module/setup.rb b/templates/default/module/setup.rb
index 487da69..3319641 100644
--- a/templates/default/module/setup.rb
+++ b/templates/default/module/setup.rb
@@ -90,3 +90,17 @@ def scopes(list)
     yield(items, scope) unless items.empty?
   end
 end
+
+def mixed_into(object, scope)
+  if !defined? @@mixed_into
+    @@mixed_into = {:class => {}, :instance => {}}
+    @@mixed_into.keys.each do |scope|
+      list = run_verifier Registry.all(:class, :module)
+      list.each do |o|
+        o.mixins(scope).each { |mi| (@@mixed_into[scope][mi.path] ||= []) << o }
+      end
+    end
+  end
+  
+  @@mixed_into[scope][object.path] || []
+end