Format all tests.

tests/corelib/string_source_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.
 
 // Test that different representations of the same string are all equal.
 
 import "dart:convert";
 
 import "package:expect/expect.dart";
 
 main() {
   var base = "\u{10412}";
   var strings = [
     "\u{10412}",
     "𐐒",
     new String.fromCharCodes([0xd801, 0xdc12]),
     base[0] + base[1],
     "$base",
     "${base[0]}${base[1]}",
     "${base[0]}${base.substring(1)}",
     new String.fromCharCodes([0x10412]),
     ("a" + base).substring(1),
-    (new StringBuffer()..writeCharCode(0xd801)
-                       ..writeCharCode(0xdc12)).toString(),
+    (new StringBuffer()..writeCharCode(0xd801)..writeCharCode(0xdc12))
+        .toString(),
     (new StringBuffer()..writeCharCode(0x10412)).toString(),
     JSON.decode('"\u{10412}"'),
     (JSON.decode('{"\u{10412}":[]}') as Map).keys.first
   ];
   for (String string in strings) {
     Expect.equals(base.length, string.length);
     Expect.equals(base, string);
     Expect.equals(base.hashCode, string.hashCode);
     Expect.listEquals(base.codeUnits.toList(), string.codeUnits.toList());
   }
 }