Fix easy rubocop issues

app/models/spree/line_item.rb

@@ -121,12 +121,12 @@ module Spree
     alias total amount
 
     def single_money
-      Spree::Money.new(price, { currency: currency })
+      Spree::Money.new(price, currency: currency)
     end
     alias single_display_amount single_money
 
     def money
-      Spree::Money.new(amount, { currency: currency })
+      Spree::Money.new(amount, currency: currency)
     end
     alias display_total money
     alias display_amount money

app/models/spree/order.rb

@@ -180,27 +180,27 @@ module Spree
     end
 
     def display_outstanding_balance
-      Spree::Money.new(outstanding_balance, { currency: currency })
+      Spree::Money.new(outstanding_balance, currency: currency)
     end
 
     def display_item_total
-      Spree::Money.new(item_total, { currency: currency })
+      Spree::Money.new(item_total, currency: currency)
     end
 
     def display_adjustment_total
-      Spree::Money.new(adjustment_total, { currency: currency })
+      Spree::Money.new(adjustment_total, currency: currency)
     end
 
     def display_tax_total
-      Spree::Money.new(tax_total, { currency: currency })
+      Spree::Money.new(tax_total, currency: currency)
     end
 
     def display_ship_total
-      Spree::Money.new(ship_total, { currency: currency })
+      Spree::Money.new(ship_total, currency: currency)
     end
 
     def display_total
-      Spree::Money.new(total, { currency: currency })
+      Spree::Money.new(total, currency: currency)
     end
 
     def to_param
@@ -266,7 +266,7 @@ module Spree
     def line_item_adjustment_totals
       Hash[line_item_adjustments.eligible.group_by(&:label).map do |label, adjustments|
         total = adjustments.sum(&:amount)
-        [label, Spree::Money.new(total, { currency: currency })]
+        [label, Spree::Money.new(total, currency: currency)]
       end]
     end
 

app/models/spree/order_inventory.rb

@@ -46,10 +46,10 @@ module Spree
       if shipment.present?
         remove_from_shipment(shipment, line_item.variant, quantity)
       else
-        order.shipments.each do |shipment|
+        order.shipments.each do |each_shipment|
           break if quantity == 0
 
-          quantity -= remove_from_shipment(shipment, line_item.variant, quantity)
+          quantity -= remove_from_shipment(each_shipment, line_item.variant, quantity)
         end
       end
     end

app/models/spree/return_authorization.rb

@@ -29,7 +29,7 @@ module Spree
     end
 
     def display_amount
-      Spree::Money.new(amount, { currency: currency })
+      Spree::Money.new(amount, currency: currency)
     end
 
     def add_variant(variant_id, quantity)