title: Warning while sending template email via sendgrid with '&'
body: <p>I'm sending an email with help of the sendgrid api v3 but got the warning/error:</p>
  
  <blockquote>
    <p>Content with characters ', " or &amp; may need to be escaped with three brackets
    {{{ content }}}</p>
  </blockquote>
  
  <p>in my api json i'm adding an link containing the <code>&amp;</code> character:</p>
  
  <p><code>{"dynamic_template_data": {"link":"...&amp;..."}}</code></p>
  
  <p>in my template i'm using the three brackets <code>{{{ link }}}</code></p>
  
  <p>Everything works as expected - email incl. link are send - but i always got the warning/error.</p>
  
  <p>Do i miss something within the json?</p>