use pkg/test

pkgs/markdown/test/util.dart

diff --git a/pkgs/markdown/test/util.dart b/pkgs/markdown/test/util.dart
index 414bdf0..2680a28 100644
--- a/pkgs/markdown/test/util.dart
+++ b/pkgs/markdown/test/util.dart
@@ -15,7 +15,6 @@
 
 /// Run tests defined in "*.unit" files inside directory [name].
 void testDirectory(String name) {
-
   // Locate the "test" directory. Use mirrors so that this works with the test
   // package, which loads this suite into an isolate.
   var testDir = p.dirname(currentMirrorSystem()