use @primary_extension_index in find_by_filename
use @primary_extension_index in find_by_filename

JJ/linguist,scttnlsn/linguist,anhongyue/test222,yyx990803/linguist,PsichiX/linguist,alvarotrigo/linguist,pcantrell/linguist,anhongyue/test222,marcojonker/test,cokeboL/linguist,wcandillon/linguist,github/linguist,alvarotrigo/linguist,meunierfrederic/octocatlinguist,JJ/linguist,manveru/linguist,steventhanna/linguist,CegepVictoriaville/linguist,sideci-sample/sideci-sample-linguist,martynbm/linguist,douglas-larocca/linguist,stanhu/linguist,sideci-sample/sideci-sample-linguist,martynbm/linguist,Rockyspade/linguist,kr/linguist,sebgod/linguist,jtbandes/linguist,ilyes14/linguist,christop/linguist,Ocramius/linguist,CoderXpert/linguist,ya7lelkom/linguist,sagar290/linguist,yscho/linguist,assimovt/ling-ist,MadcapJake/linguist,Mailaender/linguist,bluebear94/linguist,whitj00/linguist,phpsgi/linguist,JJ/linguist,jrnold/linguist,0a-/linguist,c-lipka/linguist,cokeboL/linguist,MadcapJake/linguist,whitj00/linguist,georgesuperman/linguist,Rockyspade/linguist,ilyes14/linguist,iblech/linguist,assimovt/ling-ist,erkyrath/linguist,cybernet14/linguist,mattn/linguist,c-lipka/linguist,ppaulweber/github-linguist,adamkaplan/linguist,davidzchen/linguist,mcandre/linguist,marcojonker/test,seanders/linguist,pcantrell/linguist,tschf/linguist,mcandre/linguist,pchaigno/linguist,seanders/linguist,pchaigno/linguist,BerkeleyTrue/linguist,CegepVictoriaville/linguist,yyx990803/linguist,sebgod/linguist,jtbandes/linguist,nburkley/linguist,ya7lelkom/linguist,hcatlin/linguist,github/linguist,wcandillon/linguist,mwpastore/linguist,igat259/linguist,FStarLang/linguist,thejameskyle/linguist,alitalia/linguist,pchaigno/linguist,chiranjeevjain/linguist,SRI-CSL/linguist,hcutler/linguist,cybernet14/linguist,matt40k/linguist,thejameskyle/linguist,scttnlsn/linguist,ppaulweber/github-linguist,matt40k/linguist,pchaigno/linguist,ChaiScript/linguist,ammaraskar/linguist,alitalia/linguist,christop/linguist,meunierfrederic/octocatlinguist,JJ/linguist,stanhu/linguist,R4PaSs/linguist,maxogden/linguist,blakeembrey/linguist,PsichiX/linguist,mwpastore/linguist,davidzchen/linguist,jrnold/linguist,MahmoudFayed/linguist,meunierfrederic/octocatlinguist,stanhu/linguist,hcutler/linguist,erkyrath/linguist,jjatria/linguist,erkyrath/linguist,kr/linguist,chiranjeevjain/linguist,blakeembrey/linguist,mattn/linguist,jjatria/linguist,steventhanna/linguist,a0viedo/linguist,MahmoudFayed/linguist,sagar290/linguist,hcatlin/linguist,Mx7f/linguist,georgesuperman/linguist,ammaraskar/linguist,erkyrath/linguist,iblech/linguist,sebgod/linguist,tschf/linguist,a0viedo/linguist,adamkaplan/linguist,SRI-CSL/linguist,osorgin/linguist,bluebear94/linguist,manveru/linguist,sebgod/linguist,MostAwesomeDude/linguist,nburkley/linguist,stanhu/linguist,osorgin/linguist,github/linguist,kyoungrok0517/linguist,Mx7f/linguist,BerkeleyTrue/linguist,MostAwesomeDude/linguist,gitlabhq/linguist,kyoungrok0517/linguist,yyx990803/linguist,0a-/linguist,yyx990803/linguist,yscho/linguist,github/linguist,phpsgi/linguist,CoderXpert/linguist,douglas-larocca/linguist,R4PaSs/linguist,FStarLang/linguist