[S06] s/tail-recursion/recursion/
[S06] s/tail-recursion/recursion/

Because you can use &?ROUTINE calls in a non-tail position (and execution
still carries on afterwards), it's really just normal recursion.

tokuhirom/specs,prammer/specs,tokuhirom/specs,perl6/specs,prammer/specs,prammer/specs,tokuhirom/specs,perl6/specs