title: Change devise message "Email has already been taken"
body: <p>I am using devise gem in my ruby on rails application. On user signup if an email already exists then there is a default message "Email has already been taken".</p>
  
  <p>I have changed this message in en.yml</p>
  
  <pre><code>  activerecord:
      errors:
        messages:
          taken: "User with same email already exists. Please try with another email address."
  </code></pre>
  
  <p>In view i have used:</p>
  
  <pre><code>&lt;div class="notice"&gt;&lt;%= devise_error_messages! %&gt;&lt;/div&gt;
  </code></pre>
  
  <p>Now the message i am getting is </p>
  
  <pre><code>"Email User with same email already exists. Please try with another email address."
  </code></pre>
  
  <p>The problem is that "Email" is appended at the start. </p>
  
  <p>Is there any other way to change this default message?</p>