Format all tests.

tests/language/mixin_issue10216_test.dart

Index: tests/language/mixin_issue10216_test.dart
diff --git a/tests/language/mixin_issue10216_test.dart b/tests/language/mixin_issue10216_test.dart
index 21d8d71865020533dc2a53bf69a5deeda1165c1b..b62c63c8e1e195ce55a883ad74057b76aa7104c0 100644
--- a/tests/language/mixin_issue10216_test.dart
+++ b/tests/language/mixin_issue10216_test.dart
@@ -4,12 +4,11 @@
 
 import "package:expect/expect.dart";
 
-class A  {
+class A {
   foo(x, [y]) => '$x;$y';
 }
 
-class B extends A with M1, M2, M3 {
-}
+class B extends A with M1, M2, M3 {}
 
 class M1 {}
 
@@ -26,9 +25,9 @@ makeB() {
 
 main() {
   var b = makeB();
-  Expect.equals('1;2', b.foo(1,2));
+  Expect.equals('1;2', b.foo(1, 2));
   Expect.equals('2;null', b.foo(2));
   Expect.equals('P 3', b.plain(3));
-  Expect.equals('100,4', b.bar(4,100));
+  Expect.equals('100,4', b.bar(4, 100));
   Expect.equals('null,5', b.bar(5));
 }