Removed unrelated changes.

core/includes/update.inc

@@ -11,6 +11,7 @@
 use Drupal\Component\Graph\Graph;
 use Drupal\Core\Extension\Exception\UnknownExtensionException;
 use Drupal\Core\Utility\Error;
+use Drupal\Core\Update\EquivalentUpdate;
 
 /**
  * Returns whether the minimum schema requirement has been satisfied.
@@ -186,7 +187,12 @@ function update_do_one($module, $number, $dependency_map, &$context) {
   }
 
   $results = [];
-  if (function_exists($function)) {
+  $equivalent_update = \Drupal::service('update.update_hook_registry')->getEquivalentUpdate($module, $number);
+  if ($equivalent_update instanceof EquivalentUpdate) {
+    $ret['results']['query'] = $equivalent_update->toSkipMessage();
+    $ret['results']['success'] = TRUE;
+    $context['sandbox']['#finished'] = TRUE;
+  } elseif (function_exists($function)) {
     try {
       // Update functions can return a single message, an array of messages, or
       // nothing at all.