func ExampleEqualFold() {
	fmt.Println(bytes.EqualFold([]byte("Go"), []byte("go")))
	// Output: true
}

func ExampleFields() {
	fmt.Printf("Fields are: %q", bytes.Fields([]byte("  foo bar  baz   ")))
	// Output: Fields are: ["foo" "bar" "baz"]
}

func ExampleFieldsFunc() {
	f := func(c rune) bool {
		return !unicode.IsLetter(c) && !unicode.IsNumber(c)
	}

		header:  &Header{Xattrs: map[string]string{"用戶名": "\x00hello"}},
		paxHdrs: map[string]string{paxSchilyXattr + "用戶名": "\x00hello"},
		formats: FormatPAX,
	}, {
		header:  &Header{Xattrs: map[string]string{"foo=bar": "baz"}},
		formats: FormatUnknown,
	}, {
		header:  &Header{Xattrs: map[string]string{"foo": ""}},
		paxHdrs: map[string]string{paxSchilyXattr + "foo": ""},
		formats: FormatPAX,
	}, {