Dart format with latest SDK (#207)

diff --git a/test/command_runner_test.dart b/test/command_runner_test.dart
index 29dd9fa..5f2ebaa 100644
--- a/test/command_runner_test.dart
+++ b/test/command_runner_test.dart
@@ -107,7 +107,9 @@
     });
 
     test("doesn't print hidden commands", () {
-      runner..addCommand(HiddenCommand())..addCommand(FooCommand());
+      runner
+        ..addCommand(HiddenCommand())
+        ..addCommand(FooCommand());
 
       expect(runner.usage, equals('''
 A test command runner.