Format all tests.

tests/language/label6_negative_test.dart

 // Copyright (c) 2011, 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.
 // Dart test program to test check that we catch label errors.
 
-
 class Label6NegativeTest {
   static testMain() {
-    L: while (false) {
+    L:
+    while (false) {
       break; //    ok;
       break L; //  ok
       void innerfunc() {
         if (true) break L; // Illegal: jump target is outside of function
       }
+
       innerfunc();
     }
   }
 }
 
-
 main() {
   Label6NegativeTest.testMain();
 }