Add system_test logs to guide [ci skip]

guides/source/engines.md

@@ -346,6 +346,9 @@ invoke    test_unit
 create      test/controllers/blorgh/articles_controller_test.rb
 invoke    helper
 create      app/helpers/blorgh/articles_helper.rb
+invoke  test_unit
+create    test/application_system_test_case.rb
+create    test/system/articles_test.rb
 invoke  assets
 invoke    js
 create      app/assets/javascripts/blorgh/articles.js

guides/source/generators.md

@@ -197,6 +197,9 @@ $ bin/rails generate scaffold User name:string
       invoke    jbuilder
       create      app/views/users/index.json.jbuilder
       create      app/views/users/show.json.jbuilder
+      invoke  test_unit
+      create    test/application_system_test_case.rb
+      create    test/system/users_test.rb
       invoke  assets
       invoke    coffee
       create      app/assets/javascripts/users.coffee
@@ -415,6 +418,9 @@ $ bin/rails generate scaffold Comment body:text
       invoke    jbuilder
       create      app/views/comments/index.json.jbuilder
       create      app/views/comments/show.json.jbuilder
+      invoke  test_unit
+      create    test/application_system_test_case.rb
+      create    test/system/comments_test.rb
       invoke  assets
       invoke    coffee
       create      app/assets/javascripts/comments.coffee