[Truffle] Remove debugging code left in by mistake.
[Truffle] All splat specs passing.
[Truffle] All magic comment specs passing.
[Truffle] All DATA specs passing, except for one inherited from JRuby.
[Truffle] Added Array#to_a.
[Truffle] Add String#*.
[Truffle] Pass environment variables when shelling out.
[Truffle] Get $n variables working again.
[Truffle] More support for match variables.
[Truffle] More match variables working.