Re-land "Format all multitests"

tests/language_strong/compile_time_constant_checked4_test.dart

Index: tests/language_strong/compile_time_constant_checked4_test.dart
diff --git a/tests/language_strong/compile_time_constant_checked4_test.dart b/tests/language_strong/compile_time_constant_checked4_test.dart
index 5cbff432e4bc28a0c61af2e2e43cf11316c74509..5f6226ec64b14bd8a2977e9555f33668af66f45e 100644
--- a/tests/language_strong/compile_time_constant_checked4_test.dart
+++ b/tests/language_strong/compile_time_constant_checked4_test.dart
@@ -6,13 +6,16 @@ class A {
   final _x;
   const A.a1(
     String //# 01: checked mode compile-time error, static type warning
-    x) : this.a2(x);
+      x)
+      : this.a2(x);
   const A.a2(
     String //# 02: checked mode compile-time error
-    x) : this.a3(x);
+      x)
+      : this.a3(x);
   const A.a3(
     String //# 03: checked mode compile-time error
-    x) : _x = x;
+      x)
+      : _x = x;
 }
 
 use(x) => x;