Format all tests.

tests/language/mixin_regress_11398_test.dart

Index: tests/language/mixin_regress_11398_test.dart
diff --git a/tests/language/mixin_regress_11398_test.dart b/tests/language/mixin_regress_11398_test.dart
index 0336db41f4877ff831200a75a2fe4dfcffc8feeb..31fe089d16bb3af6cf52187ebb1a9d6f9e2b7ea4 100644
--- a/tests/language/mixin_regress_11398_test.dart
+++ b/tests/language/mixin_regress_11398_test.dart
@@ -28,15 +28,16 @@ abstract class DelegateMixin {
 
 abstract class HasValueMixin implements Delegate {
   String _value;
-  set value(String value) { _value = invoke(value); }
+  set value(String value) {
+    _value = invoke(value);
+  }
+
   String get value => _value;
 }
 
-class HasValueA extends Object with HasValueMixin, DelegateMixin {
-}
+class HasValueA extends Object with HasValueMixin, DelegateMixin {}
 
-class HasValueB extends Object with DelegateMixin, HasValueMixin {
-}
+class HasValueB extends Object with DelegateMixin, HasValueMixin {}
 
 class HasValueC extends Object with HasValueMixin {
   String invoke(String value) => value;