Merge pull request #8666 from mekishizufu/fix_lambdas

Fix usage of lambda as a Rack endpoint

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -315,7 +315,7 @@ def root(options = {})
         # A pattern can also point to a +Rack+ endpoint i.e. anything that
         # responds to +call+:
         #
-        #   match 'photos/:id', to: lambda {|hash| [200, {}, "Coming soon"] }
+        #   match 'photos/:id', to: lambda {|hash| [200, {}, ["Coming soon"]] }
         #   match 'photos/:id', to: PhotoRackApp
         #   # Yes, controller actions are just rack endpoints
         #   match 'photos/:id', to: PhotosController.action(:show)
@@ -360,7 +360,7 @@ def root(options = {})
         #   +call+ or a string representing a controller's action.
         #
         #      match 'path', to: 'controller#action'
-        #      match 'path', to: lambda { |env| [200, {}, "Success!"] }
+        #      match 'path', to: lambda { |env| [200, {}, ["Success!"]] }
         #      match 'path', to: RackApp
         #
         # [:on]

railties/test/application/assets_test.rb

@@ -45,7 +45,7 @@ def assert_no_file_exists(filename)
 
       app_file 'config/routes.rb', <<-RUBY
         AppTemplate::Application.routes.draw do
-          get '*path', to: lambda { |env| [200, { "Content-Type" => "text/html" }, "Not an asset"] }
+          get '*path', to: lambda { |env| [200, { "Content-Type" => "text/html" }, ["Not an asset"]] }
         end
       RUBY
 

railties/test/railties/engine_test.rb

@@ -568,7 +568,7 @@ class Engine < ::Rails::Engine
       @plugin.write "lib/bukkits.rb", <<-RUBY
         module Bukkits
           class Engine < ::Rails::Engine
-            endpoint lambda { |env| [200, {'Content-Type' => 'text/html'}, 'hello'] }
+            endpoint lambda { |env| [200, {'Content-Type' => 'text/html'}, ['hello']] }
           end
         end
       RUBY