Format all multitests

tests/language_strong/typevariable_substitution2_test.dart

Index: tests/language_strong/typevariable_substitution2_test.dart
diff --git a/tests/language_strong/typevariable_substitution2_test.dart b/tests/language_strong/typevariable_substitution2_test.dart
index 3a7149e3577d7fe8bc256a13576323248a69a6c4..4cd858ad81163406d60880fa7ed9abadcbc53550 100644
--- a/tests/language_strong/typevariable_substitution2_test.dart
+++ b/tests/language_strong/typevariable_substitution2_test.dart
@@ -13,12 +13,11 @@ class B<T> {
 class M {}
 
 class A<T> extends B<T> with M {
-  A(T x) : super(x);  // This line must be warning free.
+  A(T x) : super(x); // This line must be warning free.
 }
 
 class C<T> = B<T> with M;
 
-
 main() {
   new A(null);
   new C<String>(''); //# 01: ok