Format all tests.

tests/language_strong/issue20476_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.
 
 import 'package:expect/expect.dart';
 
 foo() {
   try {
     try {
       return 1;
-    } catch (e1) {
-    } finally {
+    } catch (e1) {} finally {
       return 3;
     }
-  } catch (e2) {
-  } finally  {
+  } catch (e2) {} finally {
     return 5;
   }
 }
 
-
 main() {
   Expect.equals(5, foo());
 }