diff --git a/core/lib/Drupal/Component/Utility/Random.php b/core/lib/Drupal/Component/Utility/Random.php
index 1533e65..2712fba 100644
--- a/core/lib/Drupal/Component/Utility/Random.php
+++ b/core/lib/Drupal/Component/Utility/Random.php
@@ -59,10 +59,9 @@ class Random {
   public function string($length = 8, $unique = FALSE, $validator = NULL) {
     $counter = 0;
 
-    // Continue to loop if $unique is TRUE and the string has been generated
-    // already or if $callable is not null and the validate method returns
-    // FALSE. To generate a random string this loop must be carried out at least
-    // once.
+    // Continue to loop if $unique is TRUE and the generated string is not
+    // unique or if $validator is a callable that returns FALSE. To generate a
+    // random string this loop must be carried out at least once.
     do {
       if ($counter == static::MAXIMUM_TRIES) {
         throw new \RuntimeException('Unable to generate a unique random name');