replace_once space error

Hi.
I had a problem with replace_once spacing. the link was stealing 2 extra word if i check replace once option. I looked i solved with some changes in code:

linkify-text/linkify-text.php:364
It was like this:

. mb_substr( $text, $pos[0] + $pos[1]-1 );

And this was stealing 2 word from my next word after the link.
I changed it like this:

. mb_substr( $text, $pos[0] + $pos[1]-3 );

I works well now. I hope you change that soon!