Issue #2868078 by Manuel Garcia, claudiu.cristea, benjifisher, faline,...

Issue #2868078 by Manuel Garcia, claudiu.cristea, benjifisher, faline, gigiabba, ankitjain28may, mohit1604: Use new array syntax in PHP files outside of /core

sites/default/default.settings.php

@@ -88,7 +88,7 @@
  * );
  * @endcode
  */
-$databases = array();
+$databases = [];
 
 /**
  * Customizing database settings.
@@ -251,7 +251,7 @@
  *   );
  * @endcode
  */
-$config_directories = array();
+$config_directories = [];
 
 /**
  * Settings:
@@ -379,7 +379,7 @@
  * Specify every reverse proxy IP address in your environment.
  * This setting is required if $settings['reverse_proxy'] is TRUE.
  */
-# $settings['reverse_proxy_addresses'] = array('a.b.c.d', ...);
+# $settings['reverse_proxy_addresses'] = ['a.b.c.d', ...];
 
 /**
  * Set this value if your proxy server sends the client IP in a header
@@ -573,10 +573,10 @@
  * The "en" part of the variable name, is dynamic and can be any langcode of
  * any added language. (eg locale_custom_strings_de for german).
  */
-# $settings['locale_custom_strings_en'][''] = array(
+# $settings['locale_custom_strings_en'][''] = [
 #   'forum'      => 'Discussion board',
 #   '@count min' => '@count minutes',
-# );
+# ];
 
 /**
  * A custom theme for the offline page:
@@ -630,7 +630,7 @@
  *   override in a services.yml file in the same directory as settings.php
  *   (definitions in this file will override service definition defaults).
  */
-# $settings['bootstrap_config_storage'] = array('Drupal\Core\Config\BootstrapConfigStorageFactory', 'getFileStorage');
+# $settings['bootstrap_config_storage'] = ['Drupal\Core\Config\BootstrapConfigStorageFactory', 'getFileStorage'];
 
 /**
  * Configuration overrides.

sites/example.sites.php

@@ -26,9 +26,9 @@
  * example, to map https://www.drupal.org:8080/mysite/test to the configuration
  * directory sites/example.com, the array should be defined as:
  * @code
- * $sites = array(
+ * $sites = [
  *   '8080.www.drupal.org.mysite.test' => 'example.com',
- * );
+ * ];
  * @endcode
  * The URL, https://www.drupal.org:8080/mysite/test/, could be a symbolic link
  * or an Apache Alias directive that points to the Drupal root containing