case Comment:
		if bytes.Contains(t, endComment) {
			return fmt.Errorf("xml: EncodeToken of Comment containing --> marker")
		}
		p.WriteString("<!--")
		p.Write(t)
		p.WriteString("-->")
		return p.cachedWriteError()
	case ProcInst:
		// First token to be encoded which is also a ProcInst with target of xml
		// is the xml declaration. The only ProcInst where target of xml is allowed.
		if t.Target == "xml" && p.w.Buffered() != 0 {