Modified the names of some specialized versions of the position function to conform to recent naming conventions.
Modified the names of some specialized versions of the position
function to conform to recent naming conventions.

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