improve test failure message
improve test failure message

ovatsus/FunScript,NaseUkolyCZ/FunScript,mcgee/FunScript,ovatsus/FunScript,ovatsus/FunScript,ovatsus/FunScript,nwolverson/FunScript,NaseUkolyCZ/FunScript,mcgee/FunScript,ZachBray/FunScript,alfonsogarciacaro/FunScript,mcgee/FunScript,alfonsogarciacaro/FunScript,cloudRoutine/FunScript,nwolverson/FunScript,nwolverson/FunScript,cloudRoutine/FunScript,tpetricek/FunScript,mcgee/FunScript,ZachBray/FunScript,tpetricek/FunScript