a more robust check for input-only variables based on Josh's feedback
a more robust check for input-only variables based on Josh's feedback

Signed-off-by: Chris Granger <5654cde260ae99bc4d30054171b8bcd902efd19a@gmail.com>

dirvine/Eve,rschroll/Eve,adjohnson916/Eve,fineline/Eve,fineline/Eve,8l/Eve,pel-daniel/Eve,bjtitus/Eve,shamim8888/Eve,justintaft/Eve,brunotag/Eve,brunotag/Eve,brunotag/Eve,sagittaros/Eve,rschroll/Eve,steveklabnik/Eve,bjtitus/Eve,hrishimittal/Eve,justintaft/Eve,nonZero/Eve,jhftrifork/Eve,bluesnowman/Eve,bjtitus/Eve,adjohnson916/Eve,adjohnson916/Eve,dirvine/Eve,8l/Eve,nonZero/Eve,pel-daniel/Eve,pel-daniel/Eve,rschroll/Eve,sherbondy/Eve,fineline/Eve,steveklabnik/Eve,sagittaros/Eve,rschroll/Eve,brunotag/Eve,pel-daniel/Eve,Drooids/Eve,8l/Eve,hrishimittal/Eve,brunotag/Eve,rschroll/Eve,8l/Eve,tobyjsullivan/Eve,Drooids/Eve,sherbondy/Eve,jhftrifork/Eve,hrishimittal/Eve,bluesnowman/Eve,hrishimittal/Eve,tobyjsullivan/Eve,adjohnson916/Eve,dirvine/Eve,kidaa/Eve-1,tobyjsullivan/Eve,shaunstanislaus/Eve-1,sherbondy/Eve,adjohnson916/Eve,hrishimittal/Eve,fineline/Eve,jhftrifork/Eve,bjtitus/Eve,kidaa/Eve-1,nonZero/Eve,shamim8888/Eve,agumonkey/Eve,sagittaros/Eve,ViniciusAtaide/Eve,tobyjsullivan/Eve,ViniciusAtaide/Eve,nonZero/Eve,steveklabnik/Eve,agumonkey/Eve,ViniciusAtaide/Eve,dirvine/Eve,ViniciusAtaide/Eve,Drooids/Eve,agumonkey/Eve,8l/Eve,justintaft/Eve,nonZero/Eve,shaunstanislaus/Eve-1,agumonkey/Eve,fineline/Eve,kidaa/Eve-1,Drooids/Eve,shaunstanislaus/Eve-1,shaunstanislaus/Eve-1,shamim8888/Eve,sagittaros/Eve,ViniciusAtaide/Eve,sagittaros/Eve,jhftrifork/Eve,shaunstanislaus/Eve-1,shamim8888/Eve,steveklabnik/Eve,steveklabnik/Eve,kidaa/Eve-1,shamim8888/Eve,jhftrifork/Eve,bluesnowman/Eve,bluesnowman/Eve,tobyjsullivan/Eve,Drooids/Eve,sherbondy/Eve,agumonkey/Eve,sherbondy/Eve,justintaft/Eve,dirvine/Eve