Wrote tests for readtable-cases :downcase and :preserve.
Wrote tests for readtable-cases :downcase and :preserve.

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