Fix missing newline

Fixes #529

editions/tw5.com/tiddlers/howtos/Creating SubStories.tid

@@ -15,6 +15,7 @@ Click this link to get started: HelloThere
 
 <$list filter="[list[MySubStoryList]]" history="MySubHistoryList">
 <div>
+
 ! <$button message="tw-close-tiddler" class="btn-invisible">{{$:/core/images/close-button}}</$button> <$view field="title"/>
 
 <$transclude/>