Fixes variable number naming offenses in spree module

.rubocop_todo.yml

@@ -221,19 +221,16 @@ Metrics/PerceivedComplexity:
     - 'app/models/spree/ability.rb'
     - 'app/models/spree/order/checkout.rb'
 
-# Offense count: 26
+# Offense count: 24
 # Configuration parameters: EnforcedStyle, CheckMethodNames, CheckSymbols, AllowedIdentifiers, AllowedPatterns.
 # SupportedStyles: snake_case, normalcase, non_integer
 # AllowedIdentifiers: capture3, iso8601, rfc1123_date, rfc822, rfc2822, rfc3339, x86_64
 Naming/VariableNumber:
   Exclude:
-    - 'app/controllers/spree/orders_controller.rb'
     - 'app/models/content_configuration.rb'
     - 'app/models/preference_sections/main_links_section.rb'
-    - 'lib/spree/core/controller_helpers/common.rb'
     - 'spec/controllers/spree/admin/search_controller_spec.rb'
     - 'spec/models/spree/stock_item_spec.rb'
-    - 'spec/models/spree/tax_rate_spec.rb'
     - 'spec/requests/api/orders_spec.rb'
 
 # Offense count: 144

app/controllers/spree/orders_controller.rb

@@ -9,7 +9,7 @@ module Spree
 
     layout 'darkswarm'
 
-    rescue_from ActiveRecord::RecordNotFound, with: :render_404
+    rescue_from ActiveRecord::RecordNotFound, with: :render404
     helper 'spree/orders'
 
     respond_to :html, :json

lib/spree/core/controller_helpers/common.rb

@@ -38,7 +38,7 @@ module Spree
             Spree::Config[:default_seo_title]
           end
 
-          def render_404(_exception = nil)
+          def render404(_exception = nil)
             respond_to do |type|
               type.html {
                 render status: :not_found,