example: small tweak to example – add Dart code (#455)
diff --git a/example/app.dart b/example/app.dart
index 0b06b6b..d8ea6e7 100644
--- a/example/app.dart
+++ b/example/app.dart
@@ -4,6 +4,7 @@
import 'dart:async';
import 'dart:html';
+
import 'package:markdown/markdown.dart' as md;
import 'highlight.dart';
@@ -14,11 +15,15 @@
final nullSanitizer = NullTreeSanitizer();
const typing = Duration(milliseconds: 150);
-final introText = '''Markdown is the **best**!
+const introText = '''Markdown is the **best**!
* It has lists.
* It has [links](https://dart.dev).
-* It has _so much more_...''';
+* It has...
+ ```dart
+ void sourceCode() {}
+ ```
+* ...and _so much more_...''';
// Flavor support.
final basicRadio = querySelector('#basic-radio') as HtmlElement;
