Format all tests.

tests/html/trusted_html_tree_sanitizer_test.dart

Index: tests/html/trusted_html_tree_sanitizer_test.dart
diff --git a/tests/html/trusted_html_tree_sanitizer_test.dart b/tests/html/trusted_html_tree_sanitizer_test.dart
index c03e39d4074b0463758069e809ff8f3799bc3fcd..d0cc88a8c1b21f54b42ee5d817d2021d6189b9b6 100644
--- a/tests/html/trusted_html_tree_sanitizer_test.dart
+++ b/tests/html/trusted_html_tree_sanitizer_test.dart
@@ -48,8 +48,8 @@ main() {
     test("appendHtml", () {
       var oldStuff = document.body.innerHtml;
       var newStuff = '<div rumplestiltskin="value">content</div>';
-      document.body.appendHtml(newStuff,
-          treeSanitizer: NodeTreeSanitizer.trusted);
+      document.body
+          .appendHtml(newStuff, treeSanitizer: NodeTreeSanitizer.trusted);
       expect(document.body.innerHtml, oldStuff + newStuff);
     });
   });