Format all tests.

tests/html/js_dart_to_string_test.dart

Index: tests/html/js_dart_to_string_test.dart
diff --git a/tests/html/js_dart_to_string_test.dart b/tests/html/js_dart_to_string_test.dart
index d2c23f4a2df1f476e0b8fa92f03c7c7a8568654d..ed984c2476a7ad610cf1c3920d69f5d16504ea12 100644
--- a/tests/html/js_dart_to_string_test.dart
+++ b/tests/html/js_dart_to_string_test.dart
@@ -40,7 +40,7 @@ main() {
     test('custom dart', () {
       var x = new ExampleClassWithCustomToString("fooBar");
       expect(jsToStringViaCoercion(x), equals("#fooBar#"));
-      expect(jsToStringViaCoercion({'a' : 1, 'b': 2}), equals("{a: 1, b: 2}"));
+      expect(jsToStringViaCoercion({'a': 1, 'b': 2}), equals("{a: 1, b: 2}"));
     });
   });
 }