Translate country name in Spree::Price#display_country

It was not translated

core/app/models/spree/price.rb

@@ -55,7 +55,7 @@ def for_any_country?
 
     def display_country
       if country_iso
-        "#{country_iso} (#{country.name})"
+        "#{country_iso} (#{I18n.t(country_iso, scope: [:spree, :country_names])})"
       else
         I18n.t(:any_country, scope: [:spree, :admin, :prices])
       end

core/spec/models/spree/price_spec.rb

@@ -149,6 +149,24 @@
     end
   end
 
+  describe "#display_country" do
+    subject { price.display_country }
+
+    context "when country_iso nil" do
+      let(:price) { build_stubbed(:price, country_iso: nil) }
+
+      it { is_expected.to eq "Any Country" }
+    end
+
+    context "when country_iso is set" do
+      let(:price) { build_stubbed(:price, country_iso: "DE") }
+
+      it "shows country iso and translated country name" do
+        is_expected.to eq "DE (Germany)"
+      end
+    end
+  end
+
   describe 'scopes' do
     describe '.for_any_country' do
       let(:country) { create(:country) }