be consitent with ask() example

Author: OskarStark

console/style.rst

@@ -248,7 +248,9 @@ User Input Methods
 
         $io->askHidden('What is your password?');
 
-        // validates the given answer
+    In case you need to validate the given value, pass a callback validator as
+    the second argument::
+
         $io->askHidden('What is your password?', function ($password) {
             if (empty($password)) {
                 throw new \RuntimeException('Password cannot be empty.');