Merge pull request #13759 from raysrashmi/rails-spring

Spring in now under rails/spring [ci skip]

guides/code/getting_started/Gemfile

@@ -23,7 +23,7 @@ gem 'jbuilder', '~> 2.0'
 # bundle exec rake doc:rails generates the API under doc/api.
 gem 'sdoc', '~> 0.4.0',          group: :doc
 
-# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/jonleighton/spring
+# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
 gem 'spring',        group: :development
 
 # Use ActiveModel has_secure_password

guides/source/4_1_release_notes.md

@@ -64,7 +64,7 @@ Spring is running:
 ```
 
 Have a look at the
-[Spring README](https://github.com/jonleighton/spring/blob/master/README.md) to
+[Spring README](https://github.com/rails/spring/blob/master/README.md) to
 see all available features.
 
 See the [Upgrading Ruby on Rails](upgrading_ruby_on_rails.html#spring)
@@ -267,7 +267,7 @@ for detailed changes.
 ### Notable changes
 
 * The [Spring application
-  preloader](https://github.com/jonleighton/spring) is now installed
+  preloader](https://github.com/rails/spring) is now installed
   by default for new applications. It uses the development group of
   the Gemfile, so will not be installed in
   production. ([Pull Request](https://github.com/rails/rails/pull/12958))

guides/source/upgrading_ruby_on_rails.md

@@ -62,7 +62,7 @@ If you want to use Spring as your application preloader you need to:
 
 NOTE: User defined rake tasks will run in the `development` environment by
 default. If you want them to run in other environments consult the
-[Spring README](https://github.com/jonleighton/spring#rake).
+[Spring README](https://github.com/rails/spring#rake).
 
 ### `config/secrets.yml`