dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/super_constructor1_test.dart

Index: tests/compiler/dart2js_extra/super_constructor1_test.dart
diff --git a/tests/compiler/dart2js_extra/super_constructor1_test.dart b/tests/compiler/dart2js_extra/super_constructor1_test.dart
index c6fcb01ccf4a3352dbf2e1fced7953ce33ebcb72..b57031265dcc39ca0b8019a3ba9f9ce5bd4c4a0c 100644
--- a/tests/compiler/dart2js_extra/super_constructor1_test.dart
+++ b/tests/compiler/dart2js_extra/super_constructor1_test.dart
@@ -15,14 +15,18 @@ class A {
 
 class B extends A {
   int y;
-  B(i) : y = i++, super(i + 5) {
+  B(i)
+      : y = i++,
+        super(i + 5) {
     message = '${message}B($i)';
   }
 }
 
 class C extends B {
   var z;
-  C(i) : super(i * 3), z = i {
+  C(i)
+      : super(i * 3),
+        z = i {
     message = '${message}C($i)';
   }
 }