diff --git a/core/lib/Drupal/Core/Config/ConfigImporter.php b/core/lib/Drupal/Core/Config/ConfigImporter.php
index c8c5f88..b3eeb7b 100644
--- a/core/lib/Drupal/Core/Config/ConfigImporter.php
+++ b/core/lib/Drupal/Core/Config/ConfigImporter.php
@@ -914,8 +914,16 @@ protected function importInvokeOwner($op, $name) {
   }
 
   /**
+   * Imports a configuration entity rename.
+   *
    * @param string $name
+   *   The rename configuration name. A special case because both the old name
+   *   and new name are required to perform a rename. The string $name is the
+   *   old name and new name concatenated with '::'.
+   *
    * @return bool
+   *   TRUE if the configuration was imported as a configuration entity. FALSE
+   *   otherwise.
    */
   protected function importInvokeRename($name) {
     $names = explode('::', $name);
diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigImportRenameTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigImportRenameTest.php
index 61a9fef..2f17916 100644
--- a/core/modules/config/lib/Drupal/config/Tests/ConfigImportRenameTest.php
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigImportRenameTest.php
@@ -105,4 +105,3 @@ public function testRenamed() {
   }
 
 }
-