Clean up package imports and library names

pkg/analyzer/test/source/sdk_ext_test.dart

Index: pkg/analyzer/test/source/sdk_ext_test.dart
diff --git a/pkg/analyzer/test/source/sdk_ext_test.dart b/pkg/analyzer/test/source/sdk_ext_test.dart
index 01416af8ed1db36f78c5a2900f565d0ede3473cb..dbb742575ecbebb87d0e87d5cee425efbc75b2f5 100644
--- a/pkg/analyzer/test/source/sdk_ext_test.dart
+++ b/pkg/analyzer/test/source/sdk_ext_test.dart
@@ -2,7 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library test.source.sdk_ext;
+library analyzer.test.source.sdk_ext_test;
 
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/sdk_ext.dart';