Railties typos.

railties/lib/rails/engine.rb

@@ -252,12 +252,12 @@ module Rails
   #   end
   #
   # The routes above will automatically point to <tt>MyEngine::ApplicationContoller</tt>. Furthermore, you don't
-  # need to use longer url helpers like <tt>my_engine_articles_path</tt>. Instead, you shuold simply use
+  # need to use longer url helpers like <tt>my_engine_articles_path</tt>. Instead, you should simply use
   # <tt>articles_path</tt> as you would do with your application.
   #
   # To make that behaviour consistent with other parts of the framework, an isolated engine also has influence on
   # <tt>ActiveModel::Naming</tt>. When you use a namespaced model, like <tt>MyEngine::Article</tt>, it will normally
-  # use the prefix "my_engine". In an isolated engine, the prefix will be ommited in url helpers and
+  # use the prefix "my_engine". In an isolated engine, the prefix will be omitted in url helpers and
   # form fields for convenience.
   #
   #   polymorphic_url(MyEngine::Article.new) #=> "articles_path"
@@ -266,7 +266,7 @@ module Rails
   #     text_field :title #=> <input type="text" name="article[title]" id="article_title" />
   #   end
   #
-  # Additionaly isolated engine will set its name according to namespace, so
+  # Additionally isolated engine will set its name according to namespace, so
   # MyEngine::Engine.engine_name #=> "my_engine". It will also set MyEngine.table_name_prefix
   # to "my_engine_", changing MyEngine::Article model to use my_engine_article table.
   #

railties/lib/rails/generators/rails/plugin_new/templates/test/test_helper.rb

-# Configure Rails Envinronment
+# Configure Rails Environment
 ENV["RAILS_ENV"] = "test"
 
 require File.expand_path("../dummy/config/environment.rb",  __FILE__)

railties/lib/rails/generators/resource_helpers.rb

@@ -53,7 +53,7 @@ def controller_i18n_scope
           @controller_i18n_scope ||= controller_file_path.gsub('/', '.')
         end
 
-        # Loads the ORM::Generators::ActiveModel class. This class is responsable
+        # Loads the ORM::Generators::ActiveModel class. This class is responsible
         # to tell scaffold entities how to generate an specific method for the
         # ORM. Check Rails::Generators::ActiveModel for more information.
         def orm_class

railties/lib/rails/railtie/configuration.rb

@@ -18,7 +18,7 @@ def app_middleware
 
       # This allows you to modify application's generators from Railties.
       #
-      # Values set on app_generators will become defaults for applicaiton, unless
+      # Values set on app_generators will become defaults for application, unless
       # application overwrites them.
       def app_generators
         @@app_generators ||= Rails::Configuration::Generators.new