topic_poster.rb: Fix formatting of the attributes return value

app/models/topic_poster.rb

@@ -4,10 +4,12 @@ class TopicPoster < OpenStruct
   attr_accessor :user, :description, :extras, :id
 
   def attributes
-    {'user' => user,
-     'description' => description,
-     'extras' => extras,
-     'id' => id}
+    {
+      'user' => user,
+      'description' => description,
+      'extras' => extras,
+      'id' => id
+    }
   end
 
   # TODO: Remove when old list is removed