Run dartfmt on package:js

pkg/js/lib/src/varargs.dart

Index: pkg/js/lib/src/varargs.dart
diff --git a/pkg/js/lib/src/varargs.dart b/pkg/js/lib/src/varargs.dart
index 6d316b35f217bf3ac2ef46b95e35b05c78e5fd4b..84180f1d2604d4d46a1ee16116e5172443b9aed8 100644
--- a/pkg/js/lib/src/varargs.dart
+++ b/pkg/js/lib/src/varargs.dart
@@ -58,7 +58,6 @@ const _Rest rest = const _Rest();
 ///     foo.apply(null, [a, b].concat(others))
 ///
 dynamic spread(args) {
-  throw new StateError(
-      'The spread function cannot be called, '
+  throw new StateError('The spread function cannot be called, '
       'it should be compiled away.');
 }