proper error message when library setting has no value
proper error message when library setting has no value

moto-timo/robotframework,SivagnanamCiena/robotframework,moto-timo/robotframework,yonglehou/robotframework,yahman72/robotframework,kyle1986/robortframe,alexandrul-ci/robotframework,jorik041/robotframework,suvarnaraju/robotframework,xiaokeng/robotframework,xiaokeng/robotframework,alexandrul-ci/robotframework,moto-timo/robotframework,dkentw/robotframework,synsun/robotframework,alexandrul-ci/robotframework,joongh/robotframework,joongh/robotframework,userzimmermann/robotframework,robotframework/robotframework,rwarren14/robotframework,jorik041/robotframework,kurtdawg24/robotframework,JackNokia/robotframework,userzimmermann/robotframework,dkentw/robotframework,un33k/robotframework,moto-timo/robotframework,ChrisHirsch/robotframework,stasiek/robotframework,dkentw/robotframework,stasiek/robotframework,ashishdeshpande/robotframework,rwarren14/robotframework,joongh/robotframework,eric-stanley/robotframework,eric-stanley/robotframework,userzimmermann/robotframework,SivagnanamCiena/robotframework,kurtdawg24/robotframework,xiaokeng/robotframework,robotframework/robotframework,kurtdawg24/robotframework,jorik041/robotframework,ashishdeshpande/robotframework,stasiek/robotframework,eric-stanley/robotframework,snyderr/robotframework,JackNokia/robotframework,ChrisHirsch/robotframework,xiaokeng/robotframework,alexandrul-ci/robotframework,rwarren14/robotframework,jaloren/robotframework,nmrao/robotframework,kyle1986/robortframe,HelioGuilherme66/robotframework,kyle1986/robortframe,SivagnanamCiena/robotframework,snyderr/robotframework,fingeronthebutton/robotframework,wojciechtanski/robotframework,eric-stanley/robotframework,Colorfulstan/robotframework,ChrisHirsch/robotframework,synsun/robotframework,jaloren/robotframework,JackNokia/robotframework,kyle1986/robortframe,Colorfulstan/robotframework,kyle1986/robortframe,stasiek/robotframework,suvarnaraju/robotframework,wojciechtanski/robotframework,wojciechtanski/robotframework,edbrannin/robotframework,Colorfulstan/robotframework,nmrao/robotframework,snyderr/robotframework,dkentw/robotframework,jaloren/robotframework,rwarren14/robotframework,yahman72/robotframework,yahman72/robotframework,edbrannin/robotframework,joongh/robotframework,kurtdawg24/robotframework,yonglehou/robotframework,dkentw/robotframework,userzimmermann/robotframework,un33k/robotframework,userzimmermann/robotframework,synsun/robotframework,wojciechtanski/robotframework,suvarnaraju/robotframework,jorik041/robotframework,un33k/robotframework,ashishdeshpande/robotframework,ChrisHirsch/robotframework,yahman72/robotframework,synsun/robotframework,fingeronthebutton/robotframework,xiaokeng/robotframework,alexandrul-ci/robotframework,yahman72/robotframework,ashishdeshpande/robotframework,edbrannin/robotframework,suvarnaraju/robotframework,wojciechtanski/robotframework,joongh/robotframework,kurtdawg24/robotframework,nmrao/robotframework,Colorfulstan/robotframework,SivagnanamCiena/robotframework,jaloren/robotframework,jorik041/robotframework,stasiek/robotframework,fingeronthebutton/robotframework,fingeronthebutton/robotframework,fingeronthebutton/robotframework,JackNokia/robotframework,yonglehou/robotframework,HelioGuilherme66/robotframework,edbrannin/robotframework,Colorfulstan/robotframework,yonglehou/robotframework,robotframework/robotframework,suvarnaraju/robotframework,nmrao/robotframework,ChrisHirsch/robotframework,un33k/robotframework,snyderr/robotframework,synsun/robotframework,jaloren/robotframework,rwarren14/robotframework,un33k/robotframework,snyderr/robotframework,yonglehou/robotframework,JackNokia/robotframework,ashishdeshpande/robotframework,HelioGuilherme66/robotframework,SivagnanamCiena/robotframework,edbrannin/robotframework,moto-timo/robotframework,nmrao/robotframework