Added comments to explain the use of reader macros in order to avoid repeating the list of shadowed/exported symbols.
Added comments to explain the use of reader macros in order to
avoid repeating the list of shadowed/exported symbols.

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