Fix formatting according to HoundBot

app/models/concerns/variables_model.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true.
+
 module VariablesModel
   extend ActiveSupport::Concern
 

app/models/user.rb

@@ -1,6 +1,9 @@
 class User < ApplicationRecord
-  include SearchableModel, SettingsModel, VariablesModel
-  include User::TeamRoles, User::ProjectRoles
+  include SearchableModel
+  include SettingsModel
+  include VariablesModel
+  include User::TeamRoles
+  include User::ProjectRoles
 
   acts_as_token_authenticatable
   devise :invitable, :confirmable, :database_authenticatable, :registerable,

db/migrate/20180930205254_add_variables_to_users.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddVariablesToUsers < ActiveRecord::Migration[5.1]
   def up
     add_column :users, :variables, :jsonb, default: {}, null: false