Issue #3363938: Package Manager should ignore default.settings.php and default.services.yml

tests/src/Build/CoreUpdateTest.php

@@ -300,7 +300,7 @@ class CoreUpdateTest extends UpdateTestBase {
     foreach (['default.settings.php', 'default.services.yml'] as $file) {
       $file = $web_root . '/sites/default/' . $file;
       $this->assertFileIsReadable($file);
-      $this->assertStringContainsString("# This is part of Drupal $expected_version.", file_get_contents($file));
+      $this->assertStringNotContainsString("# This is part of Drupal $expected_version.", file_get_contents($file));
     }
     $this->assertDirectoryIsNotWritable("$web_root/sites/default");