Runs annotate on 'rake db:rollback' too

lib/tasks/migrate.rake

@@ -6,17 +6,19 @@
 # Unfortunately it relies on ENV for options; it'd be nice to be able to set options
 # in a per-project config file so this task can read them.
 namespace :db do
-  task :migrate do
+  [:migrate, :rollback].each do |cmd|
+    task cmd do
       Annotate::Migration.update_annotations
     end
 
-  namespace :migrate do
+    namespace cmd do
       [:change, :up, :down, :reset, :redo].each do |t|
         task t do
           Annotate::Migration.update_annotations
         end
       end
     end
+  end
 end
 
 module Annotate