Format all tests.

tests/language/regress_20074_test.dart

 // Copyright (c) 2014, 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.
 
 // Regression test for issue 20074. Check that a parameter is not declared
 // in the same scope as its function declaration.
 
 doit() {
   error(error) {
     print(error);
   }
+
   error('foobar');
 }
 
 main() {
   doit();
-}
+}