Re-land "Format all multitests"

tests/language/if_null_behavior_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Evaluation of an if-null expresion e of the form e1 ?? e2 is equivalent to
 // the evaluation of the expression ((x) => x == null ? e2 : x)(e1).  The
 // static type of e is the least upper bound of the static type of e1 and the
 // static type of e2.
 
 import "package:expect/expect.dart";
 
 class A {
   final String a;
   A(this.a);
 }
 
 class B extends A {
-  B(String v) : b = v, super(v);
+  B(String v)
+      : b = v,
+        super(v);
   final String b;
 }
 
 class C extends A {
-  C(String v) : c = v, super(v);
+  C(String v)
+      : c = v,
+        super(v);
   final String c;
 }
 
 B nullB() => null;
 C nullC() => null;
 
 noMethod(e) => e is NoSuchMethodError;
 
 main() {
   // Make sure the "none" test fails if "??" is not implemented.  This makes
@@ skipping 10 matching lines @@
   Expect.equals('B', (new B('B') ?? nullC()).a); //# 08: ok
   Expect.equals('B', (new B('B') ?? nullC()).b); //# 09: static type warning
   Expect.throws(() => (new B('B') ?? nullC()).c, noMethod); //# 10: static type warning
   Expect.equals('C', (nullB() ?? new C('C')).a); //# 11: ok
   Expect.throws(() => (nullB() ?? new C('C')).b, noMethod); //# 12: static type warning
   Expect.equals('C', (nullB() ?? new C('C')).c); //# 13: static type warning
   Expect.throws(() => (nullB() ?? nullC()).a, noMethod); //# 14: ok
   Expect.throws(() => (nullB() ?? nullC()).b, noMethod); //# 15: static type warning
   Expect.throws(() => (nullB() ?? nullC()).c, noMethod); //# 16: static type warning
 }