NAME
repeat_string
SYNOPSIS
string repeat_string(string, int);
DESCRIPTION
returns a new string
- int <= 0: ""
- int > 0 original string repeated either int times or the maximum number of
times without getting greater than the maximum string length
maxstrlen = 5:
repeat_string("ab", 3) = "abab"
maxstrlen >=6:
repeat_string("ab", 3) = "ababab"