Run dartfmt on dart2js codebase.

pkg/analyzer/test/src/dart/analysis/driver_test.dart

Index: pkg/analyzer/test/src/dart/analysis/driver_test.dart
diff --git a/pkg/analyzer/test/src/dart/analysis/driver_test.dart b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
index a466fec765c9fe99eb2feadf32645c83cf517d3f..6fc0179c1641fa3675382ce8e4a4ad6983d1c056 100644
--- a/pkg/analyzer/test/src/dart/analysis/driver_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
@@ -418,9 +418,9 @@ part of lib;
       // TODO(28522): Should cause an error for wrong library name.
       expect(errors, hasLength(0));
     } else {
-        expect(errors, hasLength(1));
-        expect(errors[0].errorCode,
-            ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART);
+      expect(errors, hasLength(1));
+      expect(errors[0].errorCode,
+          ResolverErrorCode.MISSING_LIBRARY_DIRECTIVE_WITH_PART);
     }
   }