Fix simple Rubocop issues

app/models/spree/payment.rb

@@ -188,7 +188,6 @@ module Spree
     # is used by the gateway.
     def invalidate_old_payments
       order.payments.with_state('checkout').where("id != ?", id).each do |payment|
-
         # Using update_column skips validations and so it skips validate_source. As we are just
         # invalidating past payments here, we don't want to validate all of them at this stage.
         payment.update_column(:state, 'invalid')

app/models/spree/payment/processing.rb

@@ -147,13 +147,15 @@ module Spree
           record_response(response)
 
           if response.success?
-            self.class.create!(order: order,
-                              source: self,
-                              payment_method: payment_method,
-                              amount: refund_amount.abs * -1,
-                              response_code: response.authorization,
-                              state: 'completed',
-                              skip_source_validation: true)
+            self.class.create!(
+              order: order,
+              source: self,
+              payment_method: payment_method,
+              amount: refund_amount.abs * -1,
+              response_code: response.authorization,
+              state: 'completed',
+              skip_source_validation: true
+            )
           else
             gateway_error(response)
           end