Move config.filter_parameters to you own initializer file

This is very rarely changed and does not deserve to be in application.rb

railties/lib/rails/generators/rails/app/templates/config/application.rb

@@ -23,9 +23,6 @@ module <%= app_const_base %>
     # Custom directories with classes and modules you want to be autoloadable.
     # config.autoload_paths += %W(#{config.root}/extras)
 
-    # Configure sensitive parameters which will be filtered from the log file.
-    config.filter_parameters += [:password]
-
     # Use SQL instead of Active Record's schema dumper when creating the database.
     # This is necessary if your schema can't be completely dumped by the schema dumper,
     # like if you have constraints or database-specific column types.

railties/lib/rails/generators/rails/app/templates/config/initializers/filter_parameter_logging.rb

@@ -0,0 +1,2 @@
+# Configure sensitive parameters which will be filtered from the log file.
+Rails.application.config.filter_parameters += [:password]

railties/test/application/configuration_test.rb

@@ -193,8 +193,8 @@ module ApplicationTests
     end
 
     test "filter_parameters should be able to set via config.filter_parameters in an initializer" do
-      app_file 'config/initializers/filter_parameters.rb', <<-RUBY
-        Rails.application.config.filter_parameters += [ :foo, 'bar' ]
+      app_file 'config/initializers/filter_parameters_logging.rb', <<-RUBY
+        Rails.application.config.filter_parameters += [ :password, :foo, 'bar' ]
       RUBY
 
       require "#{app_path}/config/environment"