Reorganize autoloads:

  * A new module (ActiveSupport::Autoload) is provide that extends
    autoloading with new behavior.
  * All autoloads in modules that have extended ActiveSupport::Autoload
    will be eagerly required in threadsafe environments
  * Autoloads can optionally leave off the path if the path is the same
    as full_constant_name.underscore
  * It is possible to specify that a group of autoloads live under an
    additional path. For instance, all of ActionDispatch's middlewares
    are ActionDispatch::MiddlewareName, but they live under 
    "action_dispatch/middlewares/middleware_name"
  * It is possible to specify that a group of autoloads are all found
    at the same path. For instance, a number of exceptions might all
    be declared there.
  * One consequence of this is that testing-related constants are not
    autoloaded. To get the testing helpers for a given component,
    require "component_name/test_case". For instance, "action_controller/test_case".
  * test_help.rb, which is automatically required by a Rails application's
    test helper, requires the test_case.rb for all active components, so
    this change will not be disruptive in existing or new applications.

1 files changed, 2 insertions, 2 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index 036deec6d2..67c70a0418 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -29,7 +29,7 @@ module ActionDispatch
       'ActionView::MissingTemplate'         => 'missing_template',
       'ActionController::RoutingError'      => 'routing_error',
       ActionController::UnknownAction.name  => 'unknown_action',
-      'ActionView::TemplateError'           => 'template_error'
+      'ActionView::Template::Error'         => 'template_error'
     })
 
     FAILSAFE_RESPONSE = [500, {'Content-Type' => 'text/html'},
@@ -119,7 +119,7 @@ module ActionDispatch
         return unless logger
 
         ActiveSupport::Deprecation.silence do
-          if ActionView::TemplateError === exception
+          if ActionView::Template::Error === exception
             logger.fatal(exception.to_s)
           else
             logger.fatal(