You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: examples_test.go
    path of file: ./repos/compress/s2
    
    the code of the file until where you have to start completion: // Copyright (c) 2023+ Klaus Post. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package s2_test

import (
	"bytes"
	"fmt"
	"os"

	"github.com/klauspost/compress/s2"
	"github.com/klauspost/compress/zstd"
)

func ExampleMakeDict() {
	// Read a sample
	sample, err := os.ReadFile("../testdata/gettysburg.txt")
	if err != ni
    
func ExampleMakeDict() {
	// Read a sample
	sample, err := os.ReadFile("../testdata/gettysburg.txt")
	if err != nil {
		panic(err)
	}
	fmt.Println("Input size:", len(sample))

	// Create a dictionary.
	dict := s2.MakeDict(sample, nil)
	fmt.Println("Dict size:", len(dict.Bytes()))

	encoded := dict.Encode(nil, sample)
	if len(encoded) < 20 {
		fmt.Println("Encoded size was less than 20 bytes!")
	}

	// To decode:
	decoded, err := dict.Decode(nil, encoded)
	if err != nil {
		panic(err)
	}
	if bytes.Equal(decoded, sample) {
		fmt.Println("They match!")
	}
	// OUTPUT:
	// Input size: 1548
	// Dict size: 1549
	// Encoded size was less than 20 bytes!
	// They match!
}