Update lib/documentLoaders/xhr.js

Co-Authored-By: David I. Lehn <dil@lehn.org>

Author: gkellogg

lib/documentLoaders/xhr.js

@@ -3,7 +3,7 @@
  */
 'use strict';
 
-const contentType = require ('content-type');
+const contentType = require('content-type');
 
 const {
   parseLinkHeader,