Format all tests.

tests/language/part_of_uri2_test.dart

 // Copyright (c) 2017, 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.
 
 library part_of_uri2;
 
-part "part_of_uri2_part.dart";  // declares bar1, baz1, uses URI.
-part "part_of_uri2_part2.dart";  // declares bar2, baz2, uses id.
+part "part_of_uri2_part.dart"; // declares bar1, baz1, uses URI.
+part "part_of_uri2_part2.dart"; // declares bar2, baz2, uses id.
 
 const foo = 'foo';
 const qux = "$baz1$baz2";
 
 main() {
   if (!identical(qux, "foopart21foopart12")) throw "Fail: $qux";
 }