Use more precise error messages in test_tabline.vim
Use more precise error messages in test_tabline.vim

S0lll0s/powerline,wfscheper/powerline,s0undt3ch/powerline,bartvm/powerline,areteix/powerline,firebitsbr/powerline,russellb/powerline,xfumihiro/powerline,blindFS/powerline,xxxhycl2010/powerline,junix/powerline,IvanAli/powerline,prvnkumar/powerline,Liangjianghao/powerline,bezhermoso/powerline,S0lll0s/powerline,prvnkumar/powerline,darac/powerline,xxxhycl2010/powerline,cyrixhero/powerline,bartvm/powerline,S0lll0s/powerline,s0undt3ch/powerline,lukw00/powerline,firebitsbr/powerline,lukw00/powerline,EricSB/powerline,dragon788/powerline,wfscheper/powerline,bartvm/powerline,darac/powerline,seanfisk/powerline,Luffin/powerline,seanfisk/powerline,magus424/powerline,dragon788/powerline,junix/powerline,xfumihiro/powerline,prvnkumar/powerline,wfscheper/powerline,magus424/powerline,Liangjianghao/powerline,lukw00/powerline,DoctorJellyface/powerline,magus424/powerline,junix/powerline,cyrixhero/powerline,seanfisk/powerline,kenrachynski/powerline,blindFS/powerline,QuLogic/powerline,blindFS/powerline,Luffin/powerline,Liangjianghao/powerline,DoctorJellyface/powerline,IvanAli/powerline,darac/powerline,xfumihiro/powerline,bezhermoso/powerline,bezhermoso/powerline,xxxhycl2010/powerline,areteix/powerline,russellb/powerline,firebitsbr/powerline,cyrixhero/powerline,kenrachynski/powerline,DoctorJellyface/powerline,EricSB/powerline,QuLogic/powerline,kenrachynski/powerline,areteix/powerline,russellb/powerline,dragon788/powerline,IvanAli/powerline,QuLogic/powerline,Luffin/powerline,s0undt3ch/powerline,EricSB/powerline