fix: app_file detection on Windows is broken
fix: app_file detection on Windows is broken

sinatra/sinatra,howtolearntocode/sinatra,dariubs/sinatra,howtolearntocode/sinatra,porras/sinatra,trexnix/sinatra,ktw1222/sinatra,nicoayala/sinatra,Rayheng/sinatra,davydovanton/sinatra,frechei/sinatra,trexnix/sinatra,d-bot/sinatra,wzheng1/sinatra,burningTyger/sinatra,eileencodes/sinatra,ganmacs/sinatra,ksw2599/sinatra,cyberid41/sinatra,davydovanton/sinatra,JonMidhir/sinatra,RosenDimov/sinatra,twanies/sinatra,mwpastore/sinatra,sethuster/sinatra,defsprite/sinatra,autopp/sinatra,ktw1222/sinatra,mwpastore/sinatra,porras/sinatra,defsprite/sinatra,jenalgit/sinatra,nju520/sinatra,Rayheng/sinatra,siberianbear/sinatra,QLGu/sinatra,kyontan/sinatra,eileencodes/sinatra,nottombrown/old-sinatra,lastcat/sinatra,burningTyger/sinatra,dariubs/sinatra,DoraALin/sinatra,Wirachmat/sinatra,burningTyger/sinatra,miyazawatomoka/sinatra,miyazawatomoka/sinatra,ganmacs/sinatra,mwpastore/sinatra,midorineko/sinatra,guidohcosta/sinatra,ksw2599/sinatra,jkowens/sinatra,cyberid41/sinatra,siberianbear/sinatra,JonMidhir/sinatra,ryanshaw/sinatra,nicoayala/sinatra,laplaceliu/sinatra,twanies/sinatra,jkowens/sinatra,gferguson-gd/sinatra,JonRowe/sinatra,ABaldwinHunter/sinatra-classic,Callygraphy/morrissey,jkowens/sinatra,QLGu/sinatra,midorineko/sinatra,autopp/sinatra,lastcat/sinatra,RosenDimov/sinatra,guidohcosta/sinatra,sinatra/sinatra,ryanshaw/sinatra,nju520/sinatra,DoraALin/sinatra,d-bot/sinatra,marocchino/sinatra,frechei/sinatra,kgrz/sinatra,nottombrown/old-sinatra,wzheng1/sinatra,ABaldwinHunter/sinatra-classic,blambeau/sinatra,bmizerany/sinatra,emiliocorpus/sinatra,kumji/sinatra,emiliocorpus/sinatra,Wirachmat/sinatra,JonRowe/sinatra,kumji/sinatra,jenalgit/sinatra,gferguson-gd/sinatra,kyontan/sinatra,laplaceliu/sinatra,JonMidhir/sinatra,sethuster/sinatra