Merge pull request #9306 from spark-solutions/documentation_amendments

Documentation amendments

guides/src/content/developer/core/preferences.md

@@ -11,13 +11,9 @@ To implement preferences for a model, simply add a new column called `preference
 
 ```ruby
 class AddPreferencesColumnToSpreeProducts < ActiveRecord::Migration[4.2]
-  def up
+  def change
     add_column :spree_products, :preferences, :text
   end
-
-  def down
-    remove_column :spree_products, :preferences
-  end
 end
 ```
 

guides/src/content/developer/customization/asset.md

@@ -111,7 +111,7 @@ manual inclusion in your extensions installation instructions or provide
 a Rails generator to do so.
 
 For an example of an extension using a generator to install assets and
-migrations take a look at the 
+migrations take a look at the
 [install generator for Braintree Vzero](https://github.com/spree-contrib/spree_braintree_vzero/blob/master/lib/generators/spree_braintree_vzero/install/install_generator.rb).
 
 ## Overriding Spree's core assets

guides/src/content/developer/customization/checkout.md

@@ -164,7 +164,7 @@ define several `before_actions` for the `Spree::CheckoutController`:
 
 ### The Order Model and State Machine
 
- The `Spree::Order` state machine is the foundation of the checkout process. Spree makes use of the [state_machines](hhttps://github.com/state-machines/state_machines) gem in the `Spree::Order` model as well as in several other places (such as `Spree::Shipment` and `Spree::InventoryUnit`.)
+ The `Spree::Order` state machine is the foundation of the checkout process. Spree makes use of the [state_machines](https://github.com/state-machines/state_machines) gem in the `Spree::Order` model as well as in several other places (such as `Spree::Shipment` and `Spree::InventoryUnit`.)
 
 The default checkout flow for the `Spree::Order` model is defined in
 `app/models/spree/order/checkout.rb` of spree_core.
@@ -180,7 +180,7 @@ from the system. The end result is a simplified data model along with the
 ability for store owners to search and report on incomplete/abandoned orders.
 
 <alert kind="note">
-  For more information on the state machines gem please see the [README](hhttps://github.com/state-machines/state_machines)
+  For more information on the state machines gem please see the [README](https://github.com/state-machines/state_machines)
 </alert>
 
 ## Checkout Customization

guides/src/content/developer/customization/i18n.md

@@ -78,7 +78,7 @@ When reviewing the source of any view in Spree you'll notice that all text is
 rendered by passing a string to a helper method similar to:
 
 ```erb
-<%%= Spree.t(:price) %>
+<%= Spree.t(:price) %>
 ```
 
 The *Spree.t()* helper method looks up the currently configured locale and retrieves
@@ -128,7 +128,7 @@ into English
 => Action
 ```
 
-&nbsp; 
+&nbsp;
 
 ## Setting the Default Locale
 

guides/src/content/developer/customization/view.md

@@ -35,7 +35,7 @@ All of those views will be added to your `app/views` directory under `spree` fol
 
 ### Switch storefront layout
 
-If you want to leave most of the views in tact and you want to only change the layout file you can change it by setting a [preference](/developer/core/preferences.html) in your Spree initializer (`config/initializers/spree.rb`), eg.
+If you want to leave most of the views intact and you want to only change the layout file you can change it by setting a [preference](/developer/core/preferences.html) in your Spree initializer (`config/initializers/spree.rb`), eg.
 
 ```ruby
 Spree.config do |config|

guides/src/content/developer/tutorials/getting_started_tutorial.md

@@ -122,6 +122,6 @@ Feel free to explore some of the Admin Panel features that Spree has to offer an
 
 If you've followed the steps described in this tutorial, you should now have a fully functional Spree application up and running.
 
-We recommend you should continue to [Customization section](/developer/customization/) to learn how to modify and extend your Spree application.
+We recommend you should continue to [Customization section](/developer/customization/view.html) to learn how to modify and extend your Spree application.
 
-To learn more about Spree internals please refer [Core section](/developer/core/).
+To learn more about Spree internals please refer [Core section](/developer/core/view.html).