Apply automatic rubocop fixes

spec/controllers/external_users_controller_spec.rb

@@ -1,12 +1,15 @@
+# frozen_string_literal: true
+
 require 'rails_helper'
 
 describe ExternalUsersController do
   let(:user) { FactoryBot.build(:admin) }
   let!(:users) { FactoryBot.create_pair(:external_user) }
-  before(:each) { allow(controller).to receive(:current_user).and_return(user) }
+
+  before { allow(controller).to receive(:current_user).and_return(user) }
 
   describe 'GET #index' do
-    before(:each) { get :index }
+    before { get :index }
 
     expect_assigns(users: ExternalUser.all)
     expect_status(200)
@@ -14,7 +17,7 @@ describe ExternalUsersController do
   end
 
   describe 'GET #show' do
-    before(:each) { get :show, params: { id: users.first.id } }
+    before { get :show, params: {id: users.first.id} }
 
     expect_assigns(user: ExternalUser)
     expect_status(200)