sort out attribution banners of docs assets; fixes #11976

docs/assets/js/jszip.js

@@ -1,11 +1,11 @@
-/**
-
+/*!
 JSZip - A Javascript class for generating and reading zip files
 <http://stuartk.com/jszip>
 
 (c) 2009-2012 Stuart Knightley <stuart [at] stuartk.com>
 Dual licenced under the MIT license or GPLv3. See LICENSE.markdown.
-
+*/
+/**
 Usage:
    zip = new JSZip();
    zip.file("hello.txt", "Hello, World!").file("tempfile", "nothing");