Refactor File.expand_path usage to remove additional File.join

actionview/test/actionpack/abstract/helper_test.rb

@@ -52,7 +52,7 @@ module AbstractController
     class AbstractInvalidHelpers < AbstractHelpers
       include ActionController::Helpers
 
-      path = File.join(File.expand_path('../../../fixtures', __FILE__), "helpers_missing")
+      path = File.expand_path('../../../fixtures/helpers_missing', __FILE__)
       $:.unshift(path)
       self.helpers_path = path
     end

railties/bin/rails

@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-git_path = File.join(File.expand_path('../../..', __FILE__), '.git')
+git_path = File.expand_path('../../../.git', __FILE__)
 
 if File.exist?(git_path)
   railties_path = File.expand_path('../../lib', __FILE__)

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -324,7 +324,7 @@ module Rails
       end
 
       def self.default_rc_file
-        File.join(File.expand_path('~'), '.railsrc')
+        File.expand_path('~/.railsrc')
       end
 
       private