Cleanse JS errors from DOM on Stripe failure

app/assets/javascripts/admin/payments/services/payment.js.coffee

@@ -43,7 +43,8 @@ angular.module('admin.payments').factory 'Payment', (AdminStripeElements, curren
     submit: =>
       munged = @preprocess()
       PaymentResource.create({order_id: munged.order_id}, munged, (response, headers, status) ->
-        document.body.innerHTML = Object.values(response).join('')
+        rawHtml = Object.values(response).join('').replace('[object Object]true', '')
+        document.body.innerHTML = rawHtml
         $window.history.pushState({}, '', "/admin/orders/" + munged.order_id + "/payments")
       , (response) ->
         StatusMessage.display 'error', t("spree.admin.payments.source_forms.stripe.error_saving_payment")

spec/system/admin/payments_spec.rb

@@ -62,6 +62,7 @@ describe '
       click_button "Update"
       expect(page).to have_content "Payments"
       expect(page).to have_content "Payment has been successfully created!"
+      expect(page).not_to have_content "[object Object]true"
 
       order.reload
       expect(order.state).to eq "complete"