diff --git a/core/lib/Drupal/Core/Theme/ThemeManager.php b/core/lib/Drupal/Core/Theme/ThemeManager.php
index fda8073..f9545af 100644
--- a/core/lib/Drupal/Core/Theme/ThemeManager.php
+++ b/core/lib/Drupal/Core/Theme/ThemeManager.php
@@ -173,9 +173,9 @@ public function render($hook, array $variables) {
       if (is_string($hook)) {
         \Drupal::logger('theme')->warning('Theme hook %hook not found.', ['%hook' => $hook]);
       }
-      // There is no theme implementation for the hook passed. Return FALSE so
-      // the calling function can differentiate between a hook that exists and
-      // renders an empty string, and a hook that is not implemented.
+      // There is no theme implementation for the hook(s) passed. Return FALSE
+      // so the calling function can differentiate between a hook that exists
+      // and renders an empty string, and hooks that are not implemented.
       return FALSE;
     }
     $hook = $hook_found;
@@ -228,7 +228,7 @@ public function render($hook, array $variables) {
 
     // Invoke hook_theme_suggestions_HOOK().
     $suggestions = $this->moduleHandler->invokeAll('theme_suggestions_' . $base_theme_hook, [$variables]);
-    // Prioritize suggestions from hook_theme_suggestion_HOOK implementations
+    // Prioritize suggestions from hook_theme_suggestions_HOOK() implementations
     // above other suggestions.
     $suggestions = array_merge($suggestions, array_reverse($theme_hooks));