file/edit.go
func CommentM(filename string, reLine []string) error {
	e, err := NewEdit(filename)
	if err != nil {
		return err
	}

	err = e.Comment(reLine)
	err2 := e.Close()
	if err != nil {
		return err
	}
	return err2
}
func CommentM(filename string, reLine []string) error {
	e, err := NewEdit(filename)
	if err != nil {
		return err
	}

	err = e.Comment(reLine)
	err2 := e.Close()
	if err != nil {
		return err
	}
	return err2
}
// CommentM inserts the comment character in lines that mach any regular expression
// in reLine, in the named file.