My Go HTML 템플릿에 'ZgotmplZ'가 나타나는 이유는 무엇이며 어떻게 해결할 수 있습니까?

package main

import (
    "html/template"
    "os"
)

func main() {
    funcMap := template.FuncMap{
        "attr": func(s string) template.HTMLAttr {
            return template.HTMLAttr(s)
        },
        "safe": func(s string) template.HTML {
            return template.HTML(s)
        },
    }

    template.Must(template.New("Template").Funcs(funcMap).Parse(`
    <option {{.attr | attr}}>>test</option>
        {{.html | safe}}
     `)).Execute(os.Stdout, map[string]string{
        "attr": `selected=&quot;selected&quot;`,
        "html": `<option selected=&quot;selected&quot;>test</option>`,
    })
}

<option selected=&quot;selected&quot;>test</option>
<option selected=&quot;selected&quot;>test</option>