Actually rename to rake initializers

Author: chancancode

railties/lib/rails/tasks/initializers.rake

@@ -1,5 +1,5 @@
 desc "Print out all defined initializers in the order they are invoked by Rails."
-task initializer: :environment do
+task initializers: :environment do
   Rails.application.initializers.tsort_each do |initializer|
     puts initializer.name
   end