title: formatting error python 3.6
body: <p>I get a html message that I have mapped as string and then I want to replace 3 variables with a parameter but I'm struggling with this. here is the code:</p>
  
  <pre><code>message = """
  &lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
      &lt;meta charset="UTF-8"&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;style&gt;
      body {
      !background-color: #ffffcc;
      font-family:courier;
      font-size: 120%
  }
  &lt;/style&gt;
  &lt;div&gt;
      &lt;h2 style="text-decoration:underline"&gt;Alert process failure&lt;/h2&gt;
      &lt;p&gt; The process &lt;b&gt;{{ }}&lt;/b&gt; has failure in the method &lt;b&gt;{{ }}&lt;/b&gt; due the error &lt;b&gt;{{ }}&lt;/b&gt;. Please take a look the system log and take the required 
          actions in order to solve the problem ASAP and communicate the end users.&lt;/p&gt;
  
  &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  """
  
  print(message.format('1','2','2'))
  </code></pre>
  
  <p>My error on the print is:</p>
  
  <blockquote>
    <p>ValueError: expected ':' after conversion specifier</p>
  </blockquote>
  
  <p>Event though I have included a doubt <code>{{</code> and <code>}}</code> like in other posts. The code is not going thru</p>
  
  <p>Thanks for the help!
  AU</p>