Format all tests.

tests/lib/mirrors/constructor_optional_args_test.dart

Index: tests/lib/mirrors/constructor_optional_args_test.dart
diff --git a/tests/lib/mirrors/constructor_optional_args_test.dart b/tests/lib/mirrors/constructor_optional_args_test.dart
index f9d9657e1b063b276fe771d0a0c1be50abc569fc..22a9acb7f317f7eb12c45f5ebd448d82adebd2f2 100644
--- a/tests/lib/mirrors/constructor_optional_args_test.dart
+++ b/tests/lib/mirrors/constructor_optional_args_test.dart
@@ -17,14 +17,19 @@ class A {
 class B implements A {
   final _x, _y, _z;
 
-  B([x = 'x', y = 'y']) : _x = x, _y = y, _z = null;
+  B([x = 'x', y = 'y'])
+      : _x = x,
+        _y = y,
+        _z = null;
 
-  B.more([x = 'x', y = 'y', z = 'z']) : _x = x, _y = y, _z = z;
+  B.more([x = 'x', y = 'y', z = 'z'])
+      : _x = x,
+        _y = y,
+        _z = z;
 
   toString() => 'B(x=$_x, y=$_y, z=$_z)';
 }
 
-
 main() {
   var d1 = new A(1);
   Expect.equals('B(x=1, y=y, z=null)', '$d1', 'direct 1');