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

db/migrate/20140318173000_delete_empty_group_order_articles.rb

@@ -4,6 +4,5 @@ class DeleteEmptyGroupOrderArticles < ActiveRecord::Migration[4.2]
     GroupOrderArticle.where(quantity: 0, tolerance: 0, result: [0, nil], result_computed: [0, nil]).delete_all
   end
 
-  def down
-  end
+  def down; end
 end