Added test containing the same variable in two different tree positions in FOR - ON.
Added test containing the same variable in two different tree positions in FOR - ON.

vtomole/SICL,clasp-developers/SICL,clasp-developers/SICL,clasp-developers/SICL,vtomole/SICL,vtomole/SICL,vtomole/SICL,clasp-developers/SICL