func JoinChunks(chunks []Chunk, sep string) string {
	var out string
	for x := 0; x < len(chunks); x++ {
		if x > 0 {
			out += sep
		}
		out += string(chunks[x].V)
	}
	return out
}
JoinChunks all chunk's values using `sep` as separator and return it as
string.
package text
import "fmt"
type Chunk struct {
	StartAt int
	V       []byte
}