Fix nil NoMethodError when converting a duplicated grammar
Fix nil NoMethodError when converting a duplicated grammar

We were sticking a nil value into the grammars Array when we encountered
a duplicate scope. Now we strip out nils before returning the Array.

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