[fix] Missing . in meta tags code

Author: jfhbrook

lib/generators/article.js

@@ -85,7 +85,7 @@ article.weld = function(dom, articles) {
       'documentation',
       'how-to',
       'tutorials',
-      'nodejitsu'])join(','));
+      'nodejitsu']).join(','));
 
     //
     // Remark: perform code highlighting, convert only inside <code/>