Fix phpcs

modules/config_simple_example/src/Form/ConfigSimpleExampleSettingsForm.php

 <?php
+
 namespace Drupal\config_simple_example\Form;
 
 use Drupal\Core\Form\ConfigFormBase;
@@ -8,6 +9,7 @@
  * Configure example settings for this site.
  */
 class ConfigSimpleExampleSettingsForm extends ConfigFormBase {
+
   /**
    * {@inheritdoc}
    */
@@ -30,11 +32,11 @@ protected function getEditableConfigNames() {
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('config_simple_example.settings');
 
-    $form['message'] = array(
+    $form['message'] = [
       '#type' => 'textarea',
       '#title' => $this->t('Message'),
       '#default_value' => $config->get('message'),
-    );
+    ];
 
     return parent::buildForm($form, $form_state);
   }
@@ -43,12 +45,13 @@ public function buildForm(array $form, FormStateInterface $form_state) {
    * {@inheritdoc}
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
-    // Retrieve the configuration
+    // Retrieve the configuration.
     $this->config('config_simple_example.settings')
-      // Set the submitted configuration setting
+      // Set the submitted configuration setting.
       ->set('message', $form_state->getValue('message'))
       ->save();
 
     parent::submitForm($form, $form_state);
   }
+
 }