Fix test

Author: ondrejmirtes

Diff for: tests/Rules/Cast/UselessCastRuleTest.php

@@ -47,6 +47,7 @@ public function testUselessCast(): void
 				[
 					'Casting to string something that\'s already string.',
 					46,
+					'Because the type is coming from a PHPDoc, you can turn off this check by setting <fg=cyan>treatPhpDocTypesAsCertain: false</> in your <fg=cyan>%configurationFile%</>.',
 				],
 			]
 		);