Format all tests.

tests/corelib/iterable_skip_test.dart

 // Copyright (c) 2012, 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";
 
 main() {
   List<int> list1 = <int>[1, 2, 3];
   List<int> list2 = const <int>[4, 5];
   List<String> list3 = <String>[];
   Set<int> set1 = new Set<int>();
-  set1..add(11)
-      ..add(12)
-      ..add(13);
+  set1..add(11)..add(12)..add(13);
   Set set2 = new Set();
 
   Iterable<int> skip0 = list1.skip(0);
   Expect.isTrue(skip0 is! List);
   Iterator<int> it = skip0.iterator;
   Expect.isNull(it.current);
   Expect.isTrue(it.moveNext());
   Expect.equals(1, it.current);
   Expect.isTrue(it.moveNext());
   Expect.equals(2, it.current);
@@ skipping 225 matching lines @@
     testSkipTake(collection, 5, 5);
     testSkipTake(collection, 5, 10);
     testSkipTake(collection, 5, 20);
     testSkipTake(collection, 15, 0);
     testSkipTake(collection, 15, 5);
     testSkipTake(collection, 20, 0);
     testSkipTake(collection, 20, 5);
     Expect.throws(() => longList.skip(-1), (e) => e is RangeError);
   }
 }