Format all tests.

tests/lib/async/catch_errors20_test.dart

 // Copyright (c) 2013, 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:async_helper/async_helper.dart';
 import "package:expect/expect.dart";
 import 'dart:async';
 import 'catch_errors.dart';
 
 main() {
   asyncStart();
   Completer done = new Completer();
 
   var events = [];
   // Test that nested stream (from `catchErrors`) that is delayed by a future
   // is waited for.
   catchErrors(() {
     catchErrors(() {
       new Future.error(499);
       new Future.delayed(const Duration(milliseconds: 20), () {
         events.add(42);
         done.complete(true);
       });
-    }).listen(events.add,
-              onDone: () { events.add("done"); });
+    }).listen(events.add, onDone: () {
+      events.add("done");
+    });
     throw "foo";
-  }).listen((x) { events.add("outer: $x"); },
-            onDone: () { Expect.fail("Unexpected callback"); });
+  }).listen((x) {
+    events.add("outer: $x");
+  }, onDone: () {
+    Expect.fail("Unexpected callback");
+  });
 
   done.future.whenComplete(() {
     // Give handlers time to run.
     Timer.run(() {
-      Expect.listEquals(["outer: foo",
-                          499,
-                          42,
-                        ],
-                        events);
+      Expect.listEquals([
+        "outer: foo",
+        499,
+        42,
+      ], events);
       asyncEnd();
     });
   });
 }