fix bugs in rails_on_rack [ci-skip]

guides/source/rails_on_rack.md

@@ -15,7 +15,7 @@ WARNING: This guide assumes a working knowledge of Rack protocol and Rack concep
 Introduction to Rack
 --------------------
 
-bq. Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.
+Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.
 
 - [Rack API Documentation](http://rack.rubyforge.org/doc/)
 
@@ -101,7 +101,7 @@ Action Dispatcher Middleware Stack
 
 Many of Action Dispatchers's internal components are implemented as Rack middlewares. `Rails::Application` uses `ActionDispatch::MiddlewareStack` to combine various internal and external middlewares to form a complete Rails Rack application.
 
-NOTE: `ActionDispatch::MiddlewareStack` is Rails' equivalent of `Rack::Builder`, but built for better flexibility and more features to meet Rails' requirements.
+NOTE: `ActionDispatch::MiddlewareStack` is Rails equivalent of `Rack::Builder`, but built for better flexibility and more features to meet Rails' requirements.
 
 ### Inspecting Middleware Stack