Added test for FOR - ACROSS using displaced vector of BASE-CHAR.
Added test for FOR - ACROSS using displaced vector of BASE-CHAR.

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