Format all remaining unformatted runtime files other than multitests.

runtime/observatory/lib/src/elements/nav/vm_menu.dart

Index: runtime/observatory/lib/src/elements/nav/vm_menu.dart
diff --git a/runtime/observatory/lib/src/elements/nav/vm_menu.dart b/runtime/observatory/lib/src/elements/nav/vm_menu.dart
index 4b598cd42e561905fa92f985e8e38a0ccd38aac2..c0b6877780bcd3a3dbbdf0ce16dda637c4409196 100644
--- a/runtime/observatory/lib/src/elements/nav/vm_menu.dart
+++ b/runtime/observatory/lib/src/elements/nav/vm_menu.dart
@@ -67,7 +67,8 @@ class NavVMMenuElement extends HtmlElement implements Renderable {
     final content = (_vm.isolates.map((isolate) {
       return new NavMenuItemElement(isolate.name,
           queue: _r.queue, link: Uris.inspect(isolate));
-    }).toList()..addAll(_content));
+    }).toList()
+      ..addAll(_content));
     children = [navMenu(vm.displayName, link: Uris.vm(), content: content)];
   }
 }