don't print definition for embedded struct

[justmao945]

Consider the following embedded struct:

type Test struct {
  Embed struct {
    Name string `json:"name"`
  }
}

[cee-dub]

Could you add a test case to illustrate the change in output?

[justmao945]

OK, I added a test case.

If use t.String() to print the type, you'll get

&pretty.Embedded{
            Foo: "foo",
            Bar: struct { A int "json:\"a\""; B float64 "json:\"b\""; C string "json:\"c\"" }{A:1, B:1.1, C:"bar"},
}

I don't think it is a pretty print, so I only print struct for embedded struct which has empty type Name().