reverted:
--- b/core/lib/Drupal/Component/Assertion/Inspector.php
+++ a/core/lib/Drupal/Component/Assertion/Inspector.php
@@ -205,7 +205,7 @@
    * @return bool
    *   TRUE if $traversable can be traversed and all members have all keys.
    */
+  public static function assertAllHaveKey() {
-  public static function assertAllHaveKey($traversable) {
     $args = func_get_args();
     $traversable = array_shift($args);
 
@@ -396,7 +396,7 @@
    *   TRUE if $traversable can be traversed and all members are objects with
    *   at least one of the listed classes or interfaces.
    */
+  public static function assertAllObjects() {
-  public static function assertAllObjects($traversable) {
     $args = func_get_args();
     $traversable = array_shift($args);
 
reverted:
--- b/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php
+++ a/core/lib/Drupal/Core/File/MimeType/MimeTypeGuesser.php
@@ -41,7 +41,7 @@
   /**
    * Constructs a MimeTypeGuesser object.
    *
+   * @param StreamWrapperManagerInterface $streamWrapperManager
-   * @param StreamWrapperManagerInterface $stream_wrapper_manager
    *   The stream wrapper manager.
    */
   public function __construct(StreamWrapperManagerInterface $stream_wrapper_manager) {
reverted:
--- b/core/lib/Drupal/Core/Utility/Token.php
+++ a/core/lib/Drupal/Core/Utility/Token.php
@@ -155,7 +155,7 @@
    *     array of token replacements after they are generated.
    *   - clear: A boolean flag indicating that tokens should be removed from the
    *     final text if no replacement value can be generated.
+   * @param \Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata|null
-   * @param \Drupal\Core\Render\BubbleableMetadata $bubbleable_metadata
    *   (optional) An object to which static::generate() and the hooks and
    *   functions that it invokes will add their required bubbleable metadata.
    *
reverted:
--- b/core/modules/editor/editor.api.php
+++ a/core/modules/editor/editor.api.php
@@ -51,7 +51,7 @@
  * @param \Drupal\filter\FilterFormatInterface $format
  *   The text format configuration entity. Provides context based upon which
  *   one may want to adjust the filtering.
+ * @param \Drupal\filter\FilterFormatInterface $original_format|null
- * @param \Drupal\filter\FilterFormatInterface $original_format
  *   (optional) The original text format configuration entity (when switching
  *   text formats/editors). Also provides context based upon which one may want
  *   to adjust the filtering.
reverted:
--- b/core/modules/editor/editor.module
+++ a/core/modules/editor/editor.module
@@ -261,7 +261,7 @@
  * @param \Drupal\filter\FilterFormatInterface|null $format
  *   The text format whose text editor will be used or NULL if the previously
  *   defined text format is now disabled.
+ * @param \Drupal\filter\FilterFormatInterface $original_format|null
- * @param \Drupal\filter\FilterFormatInterface $original_format
  *   (optional) The original text format (i.e. when switching text formats,
  *   $format is the text format that is going to be used, $original_format is
  *   the one that was being used initially, the one that is stored in the