fix more tests

Author: chx

tests/functional/Generator/_hook/example.module

@@ -21,13 +21,15 @@ function example_theme($existing, $type, $theme, $path): array {
         'sortby' => NULL,
         'my_module_per_page' => NULL,
       ],
+      'initial preprocess' => 'PreprocessClass::preprocessDisplay',
     ],
     'my_module_list' => [
       'variables' => [
         'my_modules' => NULL,
         'parents' => NULL,
         'tid' => NULL,
       ],
+      'initial preprocess' => 'service.name:preprocessList',
     ],
     'my_module_icon' => [
       'variables' => [