Fixed last old style word array

.rubocop_todo.yml

@@ -159,10 +159,3 @@ Style/RegexpLiteral:
     - 'spec/views/devise/registrations/edit_spec.rb'
     - 'spec/views/members/index.html.haml_spec.rb'
     - 'spec/views/posts/index.html.haml_spec.rb'
-
-# Cop supports --auto-correct.
-# Configuration parameters: SupportedStyles, WordRegex.
-# SupportedStyles: percent, brackets
-Style/WordArray:
-  EnforcedStyle: percent
-  MinSize: 4

app/controllers/omniauth_callbacks_controller.rb

@@ -30,7 +30,7 @@ class OmniauthCallbacksController < Devise::OmniauthCallbacksController
     @authentication = action.establish_authentication(auth, member)
 
     if action.member_created?
-      raise "Invalid provider" unless ['facebook', 'twitter', 'flickr'].index(auth['provider'].to_s)
+      raise "Invalid provider" unless %w(facebook twitter flickr).index(auth['provider'].to_s)
 
       session["devise.#{auth['provider']}_data"] = request.env["omniauth.auth"]
       sign_in member