title: grunt js minify convert unicode char
body: <p>My <code>script.js</code> file has code like this:</p>
  
  <pre><code>var pattern = new RegExp("^[\u0000-\u000D\u0020-\u007F\u00A1-\u00AC\u00AE-\u00FF\u0152-\u0153\u20AC\u201C\u201D\u2022]*$", "g");
  </code></pre>
  
  <p>…and when Grunt minifies it, the escape sequences (e.g. <code>\u00e1</code>) become the special characters that they stand for (e.g. <code>á</code>). I don't want the special character <code>á</code>, I want the escaped representation. What should I do to fix this?</p>