Add space in hash

lib/shopify_api/resources/marketing_event.rb

@@ -1,7 +1,7 @@
 module ShopifyAPI
   class MarketingEvent < Base
     def add_engagements(engagements)
-      engagements = {engagements: Array(engagements)}
+      engagements = { engagements: Array(engagements) }
       post(:engagements, {}, engagements.to_json)
     end
   end