jQuery.boxModel: Fix a typo

Author: mgol

entries/jQuery.boxModel.xml

@@ -7,7 +7,7 @@
   <desc>States if the current page, in the user's browser, is being rendered using the <a href="https://www.w3.org/TR/REC-CSS2/box.html">W3C CSS Box Model</a>.</desc>
   <longdesc>
     <div class="warning">
-      <p>Note: This API has been removed in jQuery 3.0; check if <code>.document.compatMode</code> is equal to <code>"CSS1Compat"</code> instead. Or, even better - always specify a DOCTYPE and avoid using quirks mode which jQuery doesn't support.</p>
+      <p>Note: This API has been removed in jQuery 3.0; check if <code>document.compatMode</code> is equal to <code>"CSS1Compat"</code> instead. Or, even better - always specify a DOCTYPE and avoid using quirks mode which jQuery doesn't support.</p>
     </div>
   </longdesc>
   <category slug="utilities"/>