Fix MathJax config with requirejs

Author: linev

scripts/JSRootCore.js

@@ -18,7 +18,7 @@
             'jqueryui-mousewheel'  : dir+'jquery.mousewheel.min',
             'jqueryui-touch-punch' : dir+'touch-punch.min',
             'rawinflate'           : dir+'rawinflate.min',
-            'MathJax'              : 'https://root.cern/js/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG,&delayStartupUntil=configured',
+            'MathJax'              : 'https://root.cern/js/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG&delayStartupUntil=configured',
             'saveSvgAsPng'         : dir+'saveSvgAsPng.min',
             'dat.gui'              : dir+'dat.gui.min',
             'threejs'              : dir+'three.min',