package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)\bcp\h+(filename\d+)\*(\.csv)`)
var str = `cp filename1*.csv
cp filename2*.csv
cp filename3*.csv
`
var substitution = "$0 $1$2"
fmt.Println(re.ReplaceAllString(str, substitution))
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/