Make interpolation error messages more informative
Make interpolation error messages more informative

buchslava/vizabi,dab2000/vizabi,buchslava/vizabi,vizabi/vizabi,vizabi/vizabi,Gapminder/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,dab2000/vizabi,sergey-filipenko/vizabi,buchslava/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,dab2000/vizabi