Issue #2578519 by phenaproxima, webchick: Node has invalid config schema for...

Issue #2578519 by phenaproxima, webchick: Node has invalid config schema for node_unpublish_by_keyword_action

core/modules/node/config/schema/node.schema.yml

@@ -90,7 +90,7 @@ action.configuration.node_unpublish_by_keyword_action:
   type: mapping
   label: 'Unpublish content containing keyword(s) configuration'
   mapping:
-    keyword:
+    keywords:
       type: sequence
       label: 'Keywords'
       sequence:

core/modules/node/tests/src/Kernel/Action/UnpublishByKeywordActionTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\node\Kernel\Action\UnpublishByKeywordActionTest.
+ */
+
+namespace Drupal\Tests\node\Kernel\Action;
+
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\system\Entity\Action;
+
+/**
+ * @group node
+ */
+class UnpublishByKeywordActionTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['action', 'node', 'system', 'user'];
+
+  /**
+   * Tests creating an action using the node_unpublish_by_keyword_action plugin.
+   *
+   * @see https://www.drupal.org/node/2578519
+   */
+  public function testUnpublishByKeywordAction() {
+    Action::create([
+      'id' => 'foo',
+      'label' => 'Foobaz',
+      'plugin' => 'node_unpublish_by_keyword_action',
+    ])->save();
+  }
+
+}