Update for default output update

Author: tmcw

test/fixture/infer-params.output.md

@@ -40,4 +40,4 @@ This method has a type in the description and a default in the code
 
 **Parameters**
 
--   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)=** 
+-   `x` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)=(default 2)** 

test/fixture/infer-params.output.md.json

@@ -716,6 +716,10 @@
                     {
                       "type": "text",
                       "value": "="
+                    },
+                    {
+                      "type": "text",
+                      "value": "(default 2)"
                     }
                   ]
                 },