json stringify and trim recommended currency

services/web/app/views/subscriptions/new.pug

@@ -4,11 +4,11 @@ block scripts
 	script(src="https://js.recurly.com/v3/recurly.js")
 
 	script(type='text/javascript').
-		window.recomendedCurrency = '#{currency}'
 		window.countryCode = '#{countryCode}'
 		window.plan_code = '#{plan_code}'
 		window.recurlyApiKey = "!{settings.apis.recurly.publicKey}"
-		window.couponCode = "#{couponCode}"
+		window.couponCode = !{JSON.stringify(couponCode)}
+		window.recomendedCurrency = !{JSON.stringify(currency.slice(0,3))}
 
 block content
 	.content.content-alt