diff --git a/core/lib/Drupal/Core/Theme/ThemeManager.php b/core/lib/Drupal/Core/Theme/ThemeManager.php
index eface70..fda8073 100644
--- a/core/lib/Drupal/Core/Theme/ThemeManager.php
+++ b/core/lib/Drupal/Core/Theme/ThemeManager.php
@@ -166,11 +166,10 @@ public function render($hook, array $variables) {
       }
     }
     if (!$hook_found) {
-      // Do not create a watchdog warning for arrays of theme hooks because
-      // every hook in the array is allowed to be unimplemented. For example,
-      // form arrays can provide an array of suggested theme hooks for theming a
-      // specific form. Therefore, we only log missing theme hook
-      // implementations for single (string) hooks.
+      // Do not log a warning for arrays of theme hooks with no implemented
+      // hooks. It's valid to pass an array of theme hooks where none of the
+      // hooks are implemented. We only log missing theme hook implementations
+      // for single (string) hooks.
       if (is_string($hook)) {
         \Drupal::logger('theme')->warning('Theme hook %hook not found.', ['%hook' => $hook]);
       }