1 files changed, 10 insertions, 5 deletions
diff --git a/guides/source/rails_on_rack.md b/guides/source/rails_on_rack.md
index 01941fa338..993cd5ac44 100644
--- a/guides/source/rails_on_rack.md
+++ b/guides/source/rails_on_rack.md
@@ -1,3 +1,5 @@
+**DO NOT READ THIS FILE ON GITHUB, GUIDES ARE PUBLISHED ON http://guides.rubyonrails.org.**
+
 Rails on Rack
 =============
 
@@ -61,7 +63,6 @@ Here's how it loads the middlewares:
 ```ruby
 def middleware
   middlewares = []
-  middlewares << [Rails::Rack::Debugger] if options[:debugger]
   middlewares << [::Rack::ContentLength]
   Hash.new(middlewares)
 end
@@ -99,6 +100,10 @@ To find out more about different `rackup` options:
 $ rackup --help
 ```
 
+### Development and auto-reloading
+
+Middlewares are loaded once and are not monitored for changes. You will have to restart the server for changes to be reflected in the running application.
+
 Action Dispatcher Middleware Stack
 ----------------------------------
 
@@ -229,7 +234,7 @@ Much of Action Controller's functionality is implemented as Middlewares. The fol
 
 **`ActionDispatch::Static`**
 
-* Used to serve static assets. Disabled if `config.serve_static_assets` is `false`.
+* Used to serve static files. Disabled if `config.serve_static_files` is `false`.
 
 **`Rack::Lock`**
 
@@ -249,7 +254,7 @@ Much of Action Controller's functionality is implemented as Middlewares. The fol
 
 **`ActionDispatch::RequestId`**
 
-* Makes a unique `X-Request-Id` header available to the response and enables the `ActionDispatch::Request#uuid` method.
+* Makes a unique `X-Request-Id` header available to the response and enables the `ActionDispatch::Request#request_id` method.
 
 **`Rails::Rack::Logger`**
 
@@ -273,7 +278,7 @@ Much of Action Controller's functionality is implemented as Middlewares. The fol
 
 **`ActionDispatch::Callbacks`**
 
-* Runs the prepare callbacks before serving the request.
+* Provides callbacks to be executed before and after dispatching the request.
 
 **`ActiveRecord::Migration::CheckPending`**
 
@@ -303,7 +308,7 @@ Much of Action Controller's functionality is implemented as Middlewares. The fol
 
 * Parses out parameters from the request into `params`.
 
-**`ActionDispatch::Head`**
+**`Rack::Head`**
 
 * Converts HEAD requests to `GET` requests and serves them as so.