Fix tests on PHP 7.4 (named arguments are not available)

tests/functional/CommonTreeDropdown.php

@@ -74,7 +74,7 @@ public function testSanitizeSeparatorInCompletename(?string $raw, ?string $sanit
     /**
      * @dataProvider completenameProvider
      */
-    public function testUnsanitizeSeparatorInCompletename(?string $sanitized, ?string $raw)
+    public function testUnsanitizeSeparatorInCompletename(?string $raw, ?string $sanitized)
     {
         $this->variable(\CommonTreeDropdown::unsanitizeSeparatorInCompletename($sanitized))->isIdenticalTo($raw);
     }