title: JSLint is suddenly reporting: Use the function form of "use strict"
body: <p>I include the statement:</p>
  
  <pre><code>"use strict";
  </code></pre>
  
  <p>at the beginning of most of my Javascript files.</p>
  
  <p>JSLint has never before warned about this. But now it is, saying:</p>
  
  <blockquote>
    <p>Use the function form of "use strict".</p>
  </blockquote>
  
  <p>Does anyone know what the "function form" would be?</p>