style: correct coding style with rubocop linter

app/helpers/stripe_helper.rb

@@ -3,10 +3,10 @@ module StripeHelper
   def safe_stripe_call(&block)
     # Check if Stripe is properly configured
     return nil unless Rails.application.config.stripe[:secret_key].present?
-    
+
     # Stripe is now initialized at application startup
     Rails.logger.debug "Using globally initialized Stripe"
-    
+
     begin
       yield if block_given?
     rescue Stripe::StripeError => e
@@ -14,4 +14,4 @@ module StripeHelper
       nil
     end
   end
-end
+end