string.sub broken for j=0 or j<i #40
Description
string.sub('abcde', 4, 1) should be an empty string, not 'bc'.
string.sub('abcde', 3, 0) should be an empty string, not 'cde'.
{{ message }}
string.sub('abcde', 4, 1) should be an empty string, not 'bc'.
string.sub('abcde', 3, 0) should be an empty string, not 'cde'.