chore: rubocop

chore: fix api test conventions

chore: rubocop -A spec/

chore: more rubocop -A

fix failing test

rubocop fixes

removes helper methods that are in my opinion dead code

more rubocop fixes

rubocop -a --auto-gen-config

config/initializers/currency_display.rb

@@ -2,6 +2,7 @@
 # have it shown in all other languages too
 I18n.available_locales.each do |locale|
   unless locale == I18n.default_locale
-    I18n.backend.store_translations(locale, number: { currency: { format: { unit: nil } } })
+    I18n.backend.store_translations(locale,
+                                    number: { currency: { format: { unit: nil } } })
   end
 end