revises fileutils dependencies in railties

With the exception of what is loaded in active_support/rails,
each file is responsible for its own dependencies. You cannot
rely on runtime order of execution.

railties/lib/rails/application.rb

@@ -1,4 +1,3 @@
-require 'fileutils'
 require 'yaml'
 require 'active_support/core_ext/hash/keys'
 require 'active_support/core_ext/object/blank'

railties/lib/rails/application/bootstrap.rb

@@ -1,6 +1,7 @@
-require "active_support/notifications"
-require "active_support/dependencies"
-require "active_support/descendants_tracker"
+require 'fileutils'
+require 'active_support/notifications'
+require 'active_support/dependencies'
+require 'active_support/descendants_tracker'
 
 module Rails
   class Application

railties/lib/rails/dev_caching.rb

@@ -1,3 +1,5 @@
+require 'fileutils'
+
 module Rails
   module DevCaching # :nodoc:
     class << self

railties/lib/rails/generators/actions/create_migration.rb

@@ -1,3 +1,4 @@
+require 'fileutils'
 require 'thor/actions'
 
 module Rails

railties/lib/rails/generators/app_base.rb

@@ -1,3 +1,4 @@
+require 'fileutils'
 require 'digest/md5'
 require 'active_support/core_ext/string/strip'
 require 'rails/version' unless defined?(Rails::VERSION)

railties/lib/rails/tasks/framework.rake

@@ -1,3 +1,4 @@
+require 'fileutils'
 require 'active_support/deprecation'
 
 namespace :app do

railties/lib/rails/tasks/restart.rake

@@ -1,3 +1,5 @@
+require 'fileutils'
+
 desc "Restart app by touching tmp/restart.txt"
 task :restart do
   FileUtils.mkdir_p('tmp')

railties/lib/rails/tasks/tmp.rake

@@ -1,3 +1,5 @@
+require 'fileutils'
+
 namespace :tmp do
   desc "Clear cache and socket files from tmp/ (narrow w/ tmp:cache:clear, tmp:sockets:clear)"
   task clear: ["tmp:cache:clear", "tmp:sockets:clear"]