[Koha] string completion problem

[Ahmed Maher]

hello ,
i have problem in string completion
the search always make string completion, and i want to stop this feature ,

if i search for specific word , it returns the words that this word is part
of .
for eaxmble , if  i search for the word  "exact"  it return  "exactly"

i used this page
http://www.indexdata.com/zebra/doc/querymodel-rpn.html#querymodel-bib1-truncation

and change the values in zebradb/ccl.properties file  in line 868 in
(startswithnt )
but there is no change

can you help me
thank you