Added comments

src/modules/node/node_module.e

@@ -238,12 +238,14 @@ feature {NONE} -- Implementation: routes
 feature -- Hooks
 
 	register_hooks (a_response: CMS_RESPONSE)
+			-- <Precursor>
 		do
 			a_response.subscribe_to_menu_system_alter_hook (Current)
 			a_response.subscribe_to_block_hook (Current)
 		end
 
 	block_list: ITERABLE [like {CMS_BLOCK}.name]
+			-- <Precursor>
 		do
 			Result := <<"node-info">>
 		end