Re-land "Format all multitests"

tests/language/const_constructor_nonconst_field_test.dart

Index: tests/language/const_constructor_nonconst_field_test.dart
diff --git a/tests/language/const_constructor_nonconst_field_test.dart b/tests/language/const_constructor_nonconst_field_test.dart
index 6dab9fd13897b1fd02cbea0afec6bccf37490ecd..dbd3755753a80ea921eac96fa9b33843e15406e1 100644
--- a/tests/language/const_constructor_nonconst_field_test.dart
+++ b/tests/language/const_constructor_nonconst_field_test.dart
@@ -9,9 +9,11 @@ class A {
   final int j = 1;
   const A();
 }
+
 int f() {
   return 3;
 }
+
 main() {
   Expect.equals(const A().j, 1);
 }