Fixed the string tests to work with Jint.
Fixed the string tests to work with Jint.

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