Merge pull request #123 from devoncarew/patch-1

Update syntax_highlighting_themes.md

Author: lennartcl

src/features/syntax_highlighting_themes.md

@@ -44,6 +44,7 @@ We support highlighting for at least the following languages, and many more:
 * ColdFusion
 * C#
 * CSS
+* Dart
 * Go
 * Groovy
 * haXe
@@ -78,4 +79,4 @@ We support highlighting for at least the following languages, and many more:
 * YAML
 </div>
 
-We are always adding new themes and new languages to support, so check the menu often! Since we use Ace to provide syntax highlighting, [feel free to log an issue there](https://github.com/ajaxorg/ace/issues?labels=mode-request&page=1&state=open) for new requests.
+We are always adding new themes and new languages to support, so check the menu often! Since we use Ace to provide syntax highlighting, [feel free to log an issue there](https://github.com/ajaxorg/ace/issues?labels=mode-request&page=1&state=open) for new requests.