Fix psalm errors

tests/CommonMarkTestWeak.php

@@ -30,16 +30,11 @@ class CommonMarkTestWeak extends CommonMarkTestStrict
     {
         $textLevelElements = \array_keys(Element::TEXT_LEVEL_ELEMENTS);
 
-        \array_walk(
-            $textLevelElements,
-            /**
-             * @param string &$element
-             * @return void
-             */
-            function (&$element) {
-                $element = \preg_quote($element, '/');
-            }
+        $textLevelElements = \array_map(
+            function ($e) { return \preg_quote($e, '/'); },
+            $textLevelElements
         );
+
         $this->textLevelElementRegex = '\b(?:' . \implode('|', $textLevelElements) . ')\b';
 
         parent::__construct($name, $data, $dataName);

tests/ParsedownTest.php

@@ -75,10 +75,7 @@ class ParsedownTest extends TestCase
 
         foreach ($this->dirs as $dir) {
             $Folder = new \DirectoryIterator($dir);
-
             foreach ($Folder as $File) {
-                /** @var $File DirectoryIterator */
-
                 if (! $File->isFile()) {
                     continue;
                 }

tests/src/StateTest.php

@@ -32,7 +32,7 @@ final class StateTest extends TestCase
 
     /**
      * @return void
-     * @throws \PHPUnit\Framework\ExpectationFailedException
+     * @throws \PHPUnit\Framework\Exception
      * @throws \SebastianBergmann\RecursionContext\InvalidArgumentException
      */
     public function testStateCloneVisibility()