Fix formatting issues

Author: mvanbeusekom

packages/cross_file/lib/src/cross_file.dart

@@ -1,3 +1,3 @@
 export 'types/interface.dart'
     if (dart.library.html) 'types/html.dart'
-    if (dart.library.io) 'types/io.dart';
+    if (dart.library.io) 'types/io.dart';