magento · dobooth · Nov 22, 2019 · Nov 17, 2019 · Nov 17, 2019 · Nov 18, 2019
diff --git a/guides/v2.2/architecture/archi_perspectives/service_layer.md b/guides/v2.2/architecture/archi_perspectives/service_layer.md
@@ -76,5 +76,5 @@ Related topics
 *  [Architectural diagrams]({{page.baseurl}}/architecture/archi_perspectives/arch_diagrams.html)
 *  [Architectural layers overview]({{page.baseurl}}/architecture/archi_perspectives/ALayers_intro.html)
 
-[catalog-api]: {{ site.mage2bloburl }}/{{ page.guide_version }}/app/code/Magento/Customer/Api
-[catalog-api-data]: {{ site.mage2bloburl }}/{{ page.guide_version }}/app/code/Magento/Customer/Api/Data
+[catalog-api]: {{ site.mage2bloburl }}/{{ page.guide_version }}/app/code/Magento/Catalog/Api
+[catalog-api-data]: {{ site.mage2bloburl }}/{{ page.guide_version }}/app/code/Magento/Catalog/Api/Data
diff --git a/guides/v2.2/coding-standards/code-standard-javascript.md b/guides/v2.2/coding-standards/code-standard-javascript.md
@@ -16,7 +16,7 @@ For the jQuery widget coding standard, see [jQuery widget coding standard][jquer
 
 ## Eslint and JSCS tools
 
-Use [ESLint][eslint] and [JSCS][jscs] to ensure the quality of your JavaScript code.
+Use [ESLint][eslint] and `JSCS` to ensure the quality of your JavaScript code.
 
 ESLint is a community-driven tool that detects errors and potential problems in JavaScript code.
 It can use custom rules to enforce specific coding standards.
@@ -359,6 +359,5 @@ var foo = 'bar',
 [jquery-widgets]: http://api.jqueryui.com/category/widgets
 [jquery-widget-coding-standard]: {{ page.baseurl }}/coding-standards/code-standard-jquery-widgets.html
 [eslint]: http://eslint.org/
-[jscs]: http://jscs.info/
 [eslint-rules]: {{ site.mage2bloburl }}/{{ page.guide_version }}/dev/tests/static/testsuite/Magento/Test/Js/_files/eslint/.eslintrc-magento
 [jscs-rules]: {{ site.mage2bloburl }}/{{ page.guide_version }}/dev/tests/static/testsuite/Magento/Test/Js/_files/jscs/.jscsrc
diff --git a/guides/v2.2/contributor-guide/backward-compatible-development/index.md b/guides/v2.2/contributor-guide/backward-compatible-development/index.md
@@ -122,6 +122,8 @@ Add a new optional parameter to the constructor at the end of the arguments list
 
 In the constructor body, if the new dependency is not provided (i.e. the value of the introduced argument is `null`), fetch the dependency using `Magento\Framework\App\ObjectManager::getInstance()`.
 
+Prefix the type name with a question mark when declaring a parameter with a `null` default value.
+
 {% collapsible Example Code %}
 
 ```php
@@ -134,7 +136,7 @@ class ExistingClass
         \Old\Dependency\Interface $oldDependency,
         $oldRequiredConstructorParameter,
         $oldOptionalConstructorParameter = null,
-        \New\Dependency\Interface $newDependency = null
+        ?\New\Dependency\Interface $newDependency = null
     ) {
         ...
         $this->newDependency = $newDependency ?: \Magento\Framework\App\ObjectManager::getInstance()->get(\New\Dependency\Interface::class);

diff --git a/guides/v2.2/extension-dev-guide/view-models.md b/guides/v2.2/extension-dev-guide/view-models.md
@@ -21,13 +21,14 @@ The following example shows how to add functionality to a core template with cus
 ```xml
 <?xml version="1.0"?>
 <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
-<body>
-  <referenceBlock name="checkout.cart.item.renderers.default">
-    <arguments>
-      <argument name="view_model" xsi:type="object">Vendor\CustomModule\ViewModel\MyClass</argument>
-    </arguments>
-  </referenceBlock>
-</body>
+    <body>
+        <referenceBlock name="checkout.cart.item.renderers.default">
+        <arguments>
+            <argument name="view_model" xsi:type="object">Vendor\CustomModule\ViewModel\MyClass</argument>
+          </arguments>
+        </referenceBlock>
+    </body>
+</page>
 ```
 
 You must implement the right interface in your `view_model` class (for example `ArgumentInterface`):

diff --git a/guides/v2.2/javascript-dev-guide/javascript/js-resources.md b/guides/v2.2/javascript-dev-guide/javascript/js-resources.md
@@ -146,7 +146,7 @@ To include a 3rd party library and use it within the entire website (using the [
 
 1. Copy `slick.less` and `slick-theme.less` to the `<theme_path>/web/css/source` folder. Also add both files to `<theme_path>/web/css/source/_extend.less`.
 
-   ```less
+   ```scss
    @import "slick.less";
    @import "slick-theme.less";
    ```

diff --git a/guides/v2.2/ui_comp_guide/concepts/knockout-bindings.md b/guides/v2.2/ui_comp_guide/concepts/knockout-bindings.md
@@ -225,7 +225,9 @@ The `i18n` binding is used to translate a string according to the currently enab
 **Usage example**:
 
 ```html
-<div data-bind="i18n: 'Translate as a standard knockout binding'"></div>
+<!-- ko i18n: 'Translate using the virtual element' --><!-- /ko -->
+
+<div data-bind="i18n: 'Translate using the standard knockout binding'"></div>
 
 <div translate="'Translate using the attribute'"></div>
 

diff --git a/guides/v2.2/ui_comp_guide/concepts/magento-bindings.md b/guides/v2.2/ui_comp_guide/concepts/magento-bindings.md
@@ -81,5 +81,5 @@ The table below shows examples of how the Knockout bindings map to their Magento
 |textInput      |`<input data-bind="textInput: value"/>`                                        | `<input textInput="value"/>`                                          |
 |value          |`<input data-bind="value: value"/>`                                            | `<input ko-value="value"/>`                                           |
 |checked        |`<input type="checkbox" data-bind="checked: isChecked"/>`                      | `<input type="checkbox" ko-checked="isChecked"/>`                     |
-|                |`<input type="radio" data-bind="value: value,checked: isSelected" />`                      | `<input type="radio" ko-checked="element.isSelected" ko-value="value" />`                     |
-|checkedValue   |`<input type="checkbox" data-bind="checkedValue: $data, checked: isChecked"/>` | `<input type="checkbox" checkedValue="$data" checked="isChecked"/>`   |
+|                |`<input type="radio" data-bind="value: value, checked: isSelected" />`                      | `<input type="radio" ko-checked="element.isSelected" ko-value="value" />`                     |
+|checkedValue   |`<input type="checkbox" data-bind="checkedValue: $data, checked: isChecked"/>` | `<input type="checkbox" checkedValue="$data" ko-checked="isChecked"/>`   |
diff --git a/guides/v2.3/contributor-guide/backward-compatible-development/index.md b/guides/v2.3/contributor-guide/backward-compatible-development/index.md
@@ -128,6 +128,8 @@ Add a new optional parameter to the constructor at the end of the arguments list
 
 In the constructor body, if the new dependency is not provided (i.e. the value of the introduced argument is `null`), fetch the dependency using `Magento\Framework\App\ObjectManager::getInstance()`.
 
+Prefix the type name with a question mark when declaring a parameter with a `null` default value.
+
 {% collapsible Example Code %}
 
 ```php
@@ -140,7 +142,7 @@ class ExistingClass
         \Old\Dependency\Interface $oldDependency,
         $oldRequiredConstructorParameter,
         $oldOptionalConstructorParameter = null,
-        \New\Dependency\Interface $newDependency = null
+        ?\New\Dependency\Interface $newDependency = null
     ) {
         ...
         $this->newDependency = $newDependency ?: \Magento\Framework\App\ObjectManager::getInstance()->get(\New\Dependency\Interface::class);

diff --git a/guides/v2.3/graphql/queries/customer-downloadable-products.md b/guides/v2.3/graphql/queries/customer-downloadable-products.md
@@ -75,3 +75,9 @@ Attribute | Type | Description
 `order_increment_id` | String | The purchase order ID
 `remaining_downloads` | String | Determines the number of times the customer can download the product
 `status` | String | Determines the stage in the order workflow when the download becomes available. Options are `Pending` and `Invoiced`
+
+## Errors
+
+Error | Description
+--- | ---
+`The current customer isn't authorized.` | The current customer is not currently logged in, or the customer's token does not exist in the `oauth_token` table.
diff --git a/guides/v2.3/graphql/queries/customer-orders.md b/guides/v2.3/graphql/queries/customer-orders.md
@@ -79,3 +79,9 @@ Attribute | Data type | Description
 `id` | Int | The ID assigned to the customer's order
 `increment_id` | String | An ID that indicates the sequence of the order in the customer's order history
 `status` | String | The status of the order, such as `open`, `processing`, or `closed`
+
+## Errors
+
+Error | Description
+--- | ---
+`The current customer isn't authorized.` | The current customer is not currently logged in, or the customer's token does not exist in the `oauth_token` table.
-Original file line number
+Diff line change
@@ Expand Up @@
 . Copy `slick.less` and `slick-theme.less` to the `<theme_path>/web/css/source` folder. Also add both files to `<theme_path>/web/css/source/_extend.less`.
-       ```less
+       ```scss
        @import "slick.less";
        @import "slick-theme.less";
        ```
@@ Expand Down @@