ssa_test shows top expressions on newlines

Eg:

(ssa 0 0)(ssa 1 1)(ssa 2 2)

becomes:

(ssa 0 0)
(ssa 1 1)
(ssa 2 2)
ssa_convert handles function calls
Fix ssa_convert error with function calls as args
eval() can evalutate ssa and ssa-call calling cat