Mishandling first character of text

[mingzian]

Another issue I found is that there is something wrong in how your program handles the very beginning of he text where search should happen. For example:

bitap('test related to text beginning', 'te', 0)
[ 10, 17 ]

That misses the match at the very beginning. Compare to:

bitap(' test related to text beginning', 'te', 0)
[ 2, 11, 18 ]