Improved indentation for the JSON code shown in the README.md file

README.md

@@ -53,7 +53,7 @@ INSTALLATION
 
    ```json
    {
-     "libraries/{$name}": ["type:drupal-library"]
+       "libraries/{$name}": ["type:drupal-library"]
    }
    ```
 
@@ -62,21 +62,21 @@ INSTALLATION
 
    ```json
    {
-      "type": "package",
-      "package": {
-        "name": "ckeditor/dialogadvtab",
-        "version": "4.8.0",
-        "type": "drupal-library",
-          "extra": {
-          "installer-name": "ckeditor/plugins/dialogadvtab"
-      },
-      "dist": {
-        "url": "https://download.ckeditor.com/dialogadvtab/releases/dialogadvtab_4.8.0.zip",
-        "type": "zip"
-      }
-    }
-  }
-  ```
+       "type": "package",
+       "package": {
+           "name": "ckeditor/dialogadvtab",
+           "version": "4.8.0",
+           "type": "drupal-library",
+           "extra": {
+               "installer-name": "ckeditor/plugins/dialogadvtab"
+           },
+           "dist": {
+               "url": "https://download.ckeditor.com/dialogadvtab/releases/dialogadvtab_4.8.0.zip",
+               "type": "zip"
+           }
+       }
+   }
+   ```
 
  * Run `composer require 'ckeditor/dialogadvtab:4.8.0'` to download the plugin.