Fix DocumentFragment.appendHtml and regenerate (some dartfmt changes included)

Bug: https://github.com/dart-lang/sdk/issues/29325
Change-Id: Id66b414e996e37b3ddd7469bbbb0deb4601a2171
Reviewed-on: https://dart-review.googlesource.com/63221
Reviewed-by: Terry Lucas <terry@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 0302d65..d984d08 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -9931,7 +9931,7 @@
    * last child of this document fragment.
    */
   void appendHtml(String text,
-      {NodeValidator validator, NodeTreeSanitizer, treeSanitizer}) {
+      {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {
     this.append(new DocumentFragment.html(text,
         validator: validator, treeSanitizer: treeSanitizer));
   }
diff --git a/tools/dom/templates/html/impl/impl_DocumentFragment.darttemplate b/tools/dom/templates/html/impl/impl_DocumentFragment.darttemplate
index 1b0f7a7..12f15b1 100644
--- a/tools/dom/templates/html/impl/impl_DocumentFragment.darttemplate
+++ b/tools/dom/templates/html/impl/impl_DocumentFragment.darttemplate
@@ -89,8 +89,8 @@
    * Parses the specified text as HTML and adds the resulting node after the
    * last child of this document fragment.
    */
-  void appendHtml(String text, {NodeValidator validator,
-      NodeTreeSanitizer, treeSanitizer}) {
+  void appendHtml(String text,
+        {NodeValidator validator, NodeTreeSanitizer treeSanitizer}) {
     this.append(new DocumentFragment.html(text, validator: validator,
         treeSanitizer: treeSanitizer));
   }