Respect `machineFormat` in package-mode.

pkg/analyzer_cli/test/driver_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // 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 analyzer_cli.test.driver;
 
 import 'dart:io';
 
 import 'package:analyzer/plugin/options.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
@@ skipping 234 matching lines @@
           // missing_return: error
           var missing_return = new AnalysisError(
               new TestSource(), 0, 1, HintCode.MISSING_RETURN, [
             ['x']
           ]);
           expect(processorFor(missing_return).severity, ErrorSeverity.ERROR);
           expect(
               outSink.toString(),
               contains(
                   "[error] This function declares a return type of 'int'"));
-          expect(outSink.toString(),
-              contains("1 error and 1 warning found."));
+          expect(outSink.toString(), contains("1 error and 1 warning found."));
         });
 
         test('language', () {
           doDrive();
           expect(driver.context.analysisOptions.enableSuperMixins, isTrue);
         });
       });
 
       group('with flags', () {
         // Shared driver command.
         var doDrive = () => drive('data/options_tests_project/test_file.dart',
             args: ['--fatal-warnings'],
             options: 'data/options_tests_project/.analysis_options');
 
         test('override fatal warning', () {
           doDrive();
           // missing_return: error
           var undefined_function = new AnalysisError(new TestSource(), 0, 1,
               StaticTypeWarningCode.UNDEFINED_FUNCTION, [
             ['x']
           ]);
           expect(
               processorFor(undefined_function).severity, ErrorSeverity.WARNING);
           // Should not be made fatal by `--fatal-warnings`.
           expect(outSink.toString(),
               contains("[warning] The function 'baz' is not defined"));
-          expect(outSink.toString(),
-              contains("1 error and 1 warning found."));
+          expect(outSink.toString(), contains("1 error and 1 warning found."));
         });
       });
     });
 
+    group('package-mode', () {
+      // Shared driver command.
+      var doDrive = () => drive('data/options_tests_project/test_file.dart',
+          args: ['--package-mode', '--machine'],
+          options: 'data/options_tests_project/.analysis_options');
+
+      test('no stats', () {
+        doDrive();
+        // Should not print stat summary.
+        expect(outSink.toString(), isEmpty);
+      });
+    });
+
 //TODO(pq): fix to be bot-friendly (sdk#25258).
 //    group('in temp directory', () {
 //      Directory savedCurrentDirectory;
 //      Directory tempDir;
 //      setUp(() {
 //        // Call base setUp.
 //        _setUp();
 //        savedCurrentDirectory = Directory.current;
 //        tempDir = Directory.systemTemp.createTempSync('analyzer_');
 //      });
@@ skipping 42 matching lines @@
 //        new Driver().start(['--package-root', 'does/not/exist', 'test.dart']);
 //        String stdout = outSink.toString();
 //        expect(exitCode, 3);
 //        expect(
 //            stdout,
 //            contains(
 //                'Package root directory (does/not/exist) does not exist.'));
 //      });
 //    });
   });
-
-
 }
 
 const emptyOptionsFile = 'data/empty_options.yaml';
 
 /// Shared driver.
 Driver driver;
 
 List<ErrorProcessor> get processors =>
     driver.context.getConfigurationData(CONFIGURED_ERROR_PROCESSORS);
 
@@ skipping 51 matching lines @@
     this.options = options;
   }
 }
 
 class TestSource implements Source {
   TestSource();
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }