diff --git a/core/modules/views/src/Plugin/views/filter/InOperator.php b/core/modules/views/src/Plugin/views/filter/InOperator.php
index d6da498..8a477f6 100644
--- a/core/modules/views/src/Plugin/views/filter/InOperator.php
+++ b/core/modules/views/src/Plugin/views/filter/InOperator.php
@@ -35,9 +35,11 @@ class InOperator extends FilterPluginBase {
   protected $valueOptions = NULL;
 
   /**
+   * The filter title.
+   *
    * @var string
    */
-  protected $valueTitle = NULL; 
+  protected $valueTitle;
 
   /**
    * Overrides \Drupal\views\Plugin\views\filter\FilterPluginBase::init().
@@ -214,7 +216,7 @@ protected function valueForm(&$form, FormStateInterface $form_state) {
         }
         elseif (empty($default_value)) {
           $keys = array_keys($options);
-          $default_value = array_shift  ($keys);
+          $default_value = array_shift($keys);
         }
         else {
           $copy = $default_value;