Fix rubocop spec.

db/migrate/20160415062917_create_personal_access_tokens.rb

@@ -2,7 +2,7 @@ class CreatePersonalAccessTokens < ActiveRecord::Migration
   def change
     create_table :personal_access_tokens do |t|
       t.references :user, index: true, foreign_key: true, null: false
-      t.string :token, index: {unique: true}, null: false
+      t.string :token, index: { unique: true }, null: false
       t.string :name, null: false
       t.boolean :revoked, default: false
       t.datetime :expires_at