heist (https://github.com/jcoglan/heist https://github.com/jcoglan/heist) a lisp interpreter in ruby also supports string interpolation. however, i think this i

heist (https://github.com/jcoglan/heist https://github.com/jcoglan/heist) a lisp interpreter in ruby also supports string interpolation. however, i think this is a side effect of how they implemented string escaping. like you want to support \r\n\t, etc. if you send strings into Kernel#eval you get this for free :)