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: wrap.go
    path of file: ./repos/faygo/vendor/github.com/kr/text
    
    the code of the file until where you have to start completion: package text

import (
	"bytes"
	"math"
)

var (
	nl = []byte{'\n'}
	sp = []byte{' '}
)

const defaultPenalty = 1e5

// Wrap wraps s into a paragraph of lines of length lim, with minimal
// raggedness.
func Wrap(s string, lim int) string {
	return string(WrapBytes([]byte(s), lim))
}

// WrapBytes wraps b into a paragraph of lines of length lim, with minimal
// raggedness.
func WrapBytes(b []byte, lim int) []byte {
	words := bytes.Split(bytes.Replace(bytes.TrimSpace(b), nl, sp, -1), sp)
	var lines [][]byte
	for _, line := range WrapWords(words, 1, lim, defaultPenalty) {
		lines = append(lines, bytes.Join(line, sp))
	}
	return bytes.Join(lines, nl)
}

// WrapWords is the low-level line-bre
    
func WrapWords(words [][]byte, spc, lim, pen int) [][][]byte {
	n := len(words)

	length := make([][]int, n)
	for i := 0; i < n; i++ {
		length[i] = make([]int, n)
		length[i][i] = len(words[i])
		for j := i + 1; j < n; j++ {
			length[i][j] = length[i][j-1] + spc + len(words[j])
		}
	}

	nbrk := make([]int, n)
	cost := make([]int, n)
	for i := range cost {
		cost[i] = math.MaxInt32
	}
	for i := n - 1; i >= 0; i-- {
		if length[i][n-1] <= lim || i == n-1 {
			cost[i] = 0
			nbrk[i] = n
		} else {
			for j := i + 1; j < n; j++ {
				d := lim - length[i][j-1]
				c := d*d + cost[j]
				if length[i][j-1] > lim {
					c += pen // too-long lines get a worse penalty
				}
				if c < cost[i] {
					cost[i] = c
					nbrk[i] = j
				}
			}
		}
	}

	var lines [][][]byte
	i := 0
	for i < n {
		lines = append(lines, words[i:nbrk[i]])
		i = nbrk[i]
	}
	return lines
}