Add Italian to language menu, and add a missing comma.

Author: dpvc

unpacked/MathJax.js

@@ -1067,7 +1067,8 @@ MathJax.Localization = {
   strings: {
     en: {menuTitle: "English", isLoaded: true},   // nothing needs to be loaded for this
     de: {menuTitle: "Deutsch"},
-    fr: {menuTitle: "Fran\u00E7ais"}
+    fr: {menuTitle: "Fran\u00E7ais"},
+    it: {menuTitle: "Italiano"}
   },
 
   //

unpacked/localization/it/it.js

@@ -44,7 +44,7 @@ MathJax.Localization.addTranslation("it",null,{ // NOTE use correct ISO-639-1 tw
           //"Math Processing Error", // NOTE: MathJax uses 'Math' as a distinct UI choice. Please translate it literally whenever possible.
 
         MathError:
-          "Errore nella formula"
+          "Errore nella formula",
           //"Math Error", // Error message used in obsolete Accessible configurations
 
         LoadFile: