Added undefined and null to typesDescription.

Author: neogeek

lib/dox.js

@@ -411,7 +411,15 @@ exports.parseTagTypes = function(str, tag) {
 
   var customPublisher = Object.assign({}, createDefaultPublisher(), {
     NAME(nameNode) {
-      return '<code>' + nameNode.name + '</code>';
+      var output = '<code>' + nameNode.name + '</code>';
+
+      if (result.type === NodeType.OPTIONAL) {
+        output += '|<code>undefined</code>';
+      } else if (result.type === NodeType.NULLABLE) {
+        output += '|<code>null</code>';
+      }
+
+      return output;
     }
   });