title: Ruby Devise 2.2 add email address along with the user.email
body: <p>Currently I am using <code>ruby devise gem 2.2.3</code>. And I tried to customize the <strong>confirmation_instructions</strong> for adding couple of email ids with the user email. </p>
  
  <p>app/mailers/my_devise_mailer.rb</p>
  
  <pre><code>class MyDeviseMailer &lt; Devise::Mailer  
    include Devise::Mailers::Helpers
  
    def confirmation_instructions(record, opts={})   
      opts[:to] = "example1@mail.com, example2@mail.com"    
      super 
    end
  end
  </code></pre>
  
  <p>config/initializers/devise.rb</p>
  
  <pre><code>config.mailer = "MyDeviseMailer"
  </code></pre>
  
  <p>And, I ran the following in my console</p>
  
  <pre><code>user = User.first
  MyDeviseMailer.delay.confirmation_instructions(user)
  </code></pre>
  
  <p>I got a output without body message. PFA</p>
  
  <p><strong>Correct</strong>
  <img src="https://i.stack.imgur.com/7FSbs.png" alt="enter image description here"></p>
  
  <p><strong>Wrong</strong>
  <img src="https://i.stack.imgur.com/XgQzw.png" alt="enter image description here"></p>
  
  <p>Can anyone tell me what I missed to add/configure?</p>