Add tests for FOR-EACH-RELEVANT-CONS with END being NIL.
Add tests for FOR-EACH-RELEVANT-CONS with END being NIL.

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