title: Add TM symbol in the subject of the email
body: <p>I need to show TM symbol in the subject of an email. I am adding it in the body of the mail using <code>&amp;#8482;</code> as we can send the email as text/html encoding. But, I need to add this in the subject line also.</p>
  
  <p>I guess this is not possible since we cannot use HTML in subject line of the email. But I want to make sure of that or maybe some other way of doing it. I am using Rails 3.</p>