title: Mentions in a rich embed are appearing as their string
body: <p>I'm having a problem where my bot does not mention correctly in rich embeds. It appears to be unable to tag a user at all.</p>
  
  <p>A mention ends up looking like...</p>
  
  <blockquote>
    <p><code>&lt;@601756839956447232&gt;</code></p>
  </blockquote>
  
  <p>It <em>should</em> ping the user and look like...  </p>
  
  <blockquote>
    <p><a href="https://i.stack.imgur.com/tps4E.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tps4E.png" alt="@StackOverflow"></a></p>
  </blockquote>
  
  <hr>
  
  <ul>
  <li>I've tried doing <code>author.toString()</code> in my message.</li>
  <li>I've tried using <code>&lt;@${author.id}&gt;</code>.</li>
  <li>I've tried using <code>@${author.tag}</code>.</li>
  <li>I've tried using <code>${author}</code>.</li>
  </ul>
  
  <p>All of these attempts produce the same result.</p>
  
  <hr>
  
  <p>This is the code I'm using...</p>
  
  <pre class="lang-js prettyprint-override"><code>var serv = message.guild
  var author = message.author
  
  var myInfo = new discord.RichEmbed()
      .setAuthor(`${serv.name}'s roles`,`${message.guild.iconURL}`)
      .addField(`Roles`, serv.roles.map(r =&gt; `${r}`).join(' | '),true)
      .setColor(0xffd000)
      .setFooter('Server Roles.')
      .setFooter(`Requested by @${author.tag}`,`${author.avatarURL}`)
  
  message.channel.sendEmbed(myInfo);
  </code></pre>
  
  <p><strong>My main goal here is to tag the user in the embed message without tagging the user.</strong>
  My main focus is to get <a href="https://imgur.com/a/hbgm1TX" rel="noreferrer">https://imgur.com/a/hbgm1TX</a> to <a href="https://imgur.com/a/lB1Moh9" rel="noreferrer">https://imgur.com/a/lB1Moh9</a> but the ping does NOT actually ping anyone located in the embed.</p>