rewrite core find_setupwith loop
rewrite core find_setupwith loop

Clarify some variabels and give them different names and also update the
comments to be more explicit..

numba/numba,seibert/numba,seibert/numba,cpcloud/numba,numba/numba,cpcloud/numba,IntelLabs/numba,IntelLabs/numba,numba/numba,cpcloud/numba,cpcloud/numba,numba/numba,IntelLabs/numba,numba/numba,seibert/numba,IntelLabs/numba,IntelLabs/numba,seibert/numba,seibert/numba,cpcloud/numba