Issue #3052940 by Krzysztof Domański: Incorrect data type for the expected parameter

core/modules/filter/tests/src/Unit/FilterHtmlTest.php

@@ -37,7 +37,7 @@ protected function setUp() {
    *
    * @param string $html
    *   Input HTML.
-   * @param array $expected
+   * @param string $expected
    *   The expected output string.
    */
   public function testfilterAttributes($html, $expected) {