func randomInsert(src *rand.Rand, s, val string) string {
	if s == "" {
		return val
	}

	idx := src.Int63n(int64(len(s) + 1))

	return s[0:idx] + val + s[idx:]
}
// randomInsert randomly inserts the given value into the given string.
randomInsert randomly inserts the given value into the given string.
// randomInsert randomly inserts the given value into the given string .
func randomInsert(src *rand.Rand, s, val string) string {
	if s == "" {
		return val
	}
	idx := src.Int63n(int64(len(s) + 1))
	return s[0:idx] + val + s[idx:]
}
func randomInsert ( src * rand . Rand , s , val string ) string { if s == " " { return val } idx := src . Int63n ( int64 ( len ( s ) + 1 ) ) return s [ 0 : idx ] + val + s [ idx : ] }
randomInsert randomly inserts the given value into the given string.
randomInsert randomly inserts the given value into the given string .