title: Multiline comment missing. at heredoc
body: <p>I used ejs and heredoc to compile xml files : </p>
  
  <pre><code>const ejs = require('ejs');
  const heredoc = require('heredoc');
  
  var tpl = heredoc(function(){/*
    &lt;xml&gt;
    &lt;ToUserName&gt;&lt;![CDATA[&lt;%= toUserName %&gt;]]&gt;&lt;/ToUserName&gt;
    &lt;FromUserName&gt;&lt;![CDATA[&lt;%= fromUserName %&gt;]]&gt;&lt;/FromUserName&gt;
    ....
    &lt;/xml&gt;
  */});
  </code></pre>
  
  <p>however,after using jslint and compiling by babel,it becomes like this :</p>
  
  <pre><code>var ejs=require("ejs"),heredoc=require("heredoc"),
  tpl=heredoc(function(){});
  </code></pre>
  
  <p>the content in heredoc was missing. <strong>It seems that the compiler regards the code inside as comments.</strong></p>
  
  <p>Does anyone know how to solve this ? </p>