Fix handling of non-alpha search terms in SearchableQuerySet.
Fix handling of non-alpha search terms in SearchableQuerySet.

frankier/mezzanine,viaregio/mezzanine,adrian-the-git/mezzanine,tuxinhang1989/mezzanine,Cajoline/mezzanine,Cicero-Zhao/mezzanine,stephenmcd/mezzanine,frankier/mezzanine,SoLoHiC/mezzanine,orlenko/sfpirg,orlenko/plei,SoLoHiC/mezzanine,gradel/mezzanine,dovydas/mezzanine,christianwgd/mezzanine,vladir/mezzanine,sjdines/mezzanine,frankchin/mezzanine,jerivas/mezzanine,viaregio/mezzanine,stephenmcd/mezzanine,jerivas/mezzanine,joshcartme/mezzanine,promil23/mezzanine,wrwrwr/mezzanine,wyzex/mezzanine,agepoly/mezzanine,theclanks/mezzanine,adrian-the-git/mezzanine,webounty/mezzanine,joshcartme/mezzanine,scarcry/snm-mezzanine,spookylukey/mezzanine,theclanks/mezzanine,Skytorn86/mezzanine,promil23/mezzanine,orlenko/sfpirg,douglaskastle/mezzanine,scarcry/snm-mezzanine,eino-makitalo/mezzanine,wyzex/mezzanine,jerivas/mezzanine,nikolas/mezzanine,christianwgd/mezzanine,stbarnabas/mezzanine,dekomote/mezzanine-modeltranslation-backport,cccs-web/mezzanine,AlexHill/mezzanine,viaregio/mezzanine,mush42/mezzanine,jjz/mezzanine,promil23/mezzanine,douglaskastle/mezzanine,ZeroXn/mezzanine,emile2016/mezzanine,ryneeverett/mezzanine,eino-makitalo/mezzanine,agepoly/mezzanine,Skytorn86/mezzanine,mush42/mezzanine,industrydive/mezzanine,emile2016/mezzanine,dekomote/mezzanine-modeltranslation-backport,dovydas/mezzanine,wbtuomela/mezzanine,ryneeverett/mezzanine,scarcry/snm-mezzanine,saintbird/mezzanine,frankier/mezzanine,adrian-the-git/mezzanine,nikolas/mezzanine,damnfine/mezzanine,wbtuomela/mezzanine,douglaskastle/mezzanine,orlenko/plei,frankchin/mezzanine,tuxinhang1989/mezzanine,dovydas/mezzanine,PegasusWang/mezzanine,gradel/mezzanine,wrwrwr/mezzanine,emile2016/mezzanine,Cicero-Zhao/mezzanine,geodesign/mezzanine,readevalprint/mezzanine,eino-makitalo/mezzanine,AlexHill/mezzanine,dsanders11/mezzanine,nikolas/mezzanine,dsanders11/mezzanine,webounty/mezzanine,Kniyl/mezzanine,molokov/mezzanine,cccs-web/mezzanine,fusionbox/mezzanine,industrydive/mezzanine,dsanders11/mezzanine,sjdines/mezzanine,mush42/mezzanine,PegasusWang/mezzanine,tuxinhang1989/mezzanine,molokov/mezzanine,damnfine/mezzanine,biomassives/mezzanine,sjuxax/mezzanine,SoLoHiC/mezzanine,dustinrb/mezzanine,agepoly/mezzanine,industrydive/mezzanine,dustinrb/mezzanine,jjz/mezzanine,sjuxax/mezzanine,spookylukey/mezzanine,batpad/mezzanine,orlenko/plei,Kniyl/mezzanine,dustinrb/mezzanine,biomassives/mezzanine,Skytorn86/mezzanine,readevalprint/mezzanine,wbtuomela/mezzanine,geodesign/mezzanine,theclanks/mezzanine,frankchin/mezzanine,saintbird/mezzanine,sjuxax/mezzanine,molokov/mezzanine,Cajoline/mezzanine,ZeroXn/mezzanine,jjz/mezzanine,spookylukey/mezzanine,sjdines/mezzanine,PegasusWang/mezzanine,christianwgd/mezzanine,saintbird/mezzanine,batpad/mezzanine,ZeroXn/mezzanine,dekomote/mezzanine-modeltranslation-backport,vladir/mezzanine,stephenmcd/mezzanine,damnfine/mezzanine,readevalprint/mezzanine,ryneeverett/mezzanine,webounty/mezzanine,orlenko/sfpirg,wyzex/mezzanine,biomassives/mezzanine,geodesign/mezzanine,gradel/mezzanine,Kniyl/mezzanine,vladir/mezzanine,joshcartme/mezzanine,fusionbox/mezzanine,stbarnabas/mezzanine,Cajoline/mezzanine