diff --git a/core/lib/Drupal/Core/Render/Element/Checkboxes.php b/core/lib/Drupal/Core/Render/Element/Checkboxes.php
index a1bd903..1b59cd3 100644
--- a/core/lib/Drupal/Core/Render/Element/Checkboxes.php
+++ b/core/lib/Drupal/Core/Render/Element/Checkboxes.php
@@ -155,7 +155,7 @@ static public function getCheckedCheckboxes(array $input) {
    *   TRUE if all options are unchecked. FALSE otherwise.
    */
   static public function detectEmptyCheckboxes(array $input) {
-    return (bool) empty(static::getCheckedCheckboxes($input));
+    return empty(static::getCheckedCheckboxes($input));
   }
 
 }
diff --git a/core/modules/views/src/Form/ViewsExposedForm.php b/core/modules/views/src/Form/ViewsExposedForm.php
index a6f6987..0f55ef3 100644
--- a/core/modules/views/src/Form/ViewsExposedForm.php
+++ b/core/modules/views/src/Form/ViewsExposedForm.php
@@ -181,6 +181,8 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       if (!empty($key) && !in_array($key, $exclude)) {
         if (is_array($value)) {
           // Handle checkboxes, we only want to include the checked options.
+          // @TODO: revisit the need for this when
+          // https://www.drupal.org/node/342316 is resolved.
           $checked = Checkboxes::getCheckedCheckboxes($value);
           foreach ($checked as $option_id) {
             $view->exposed_raw_input[$option_id] = $value[$option_id];
diff --git a/core/modules/views/src/Plugin/views/filter/InOperator.php b/core/modules/views/src/Plugin/views/filter/InOperator.php
index 4d7bac0..fc1ea4d 100644
--- a/core/modules/views/src/Plugin/views/filter/InOperator.php
+++ b/core/modules/views/src/Plugin/views/filter/InOperator.php
@@ -288,7 +288,7 @@ public function reduceValueOptions($input = NULL) {
   }
 
   /**
-   * @inheritdoc
+   * {@inheritdoc}
    */
   public function acceptExposedInput($input) {
     if (empty($this->options['exposed'])) {