shape analysis clarify comments, refactor constants
shape analysis clarify comments, refactor constants

stonebig/numba,sklam/numba,stuartarchibald/numba,gmarkall/numba,sklam/numba,stuartarchibald/numba,cpcloud/numba,IntelLabs/numba,seibert/numba,stonebig/numba,cpcloud/numba,jriehl/numba,IntelLabs/numba,numba/numba,cpcloud/numba,IntelLabs/numba,stonebig/numba,sklam/numba,jriehl/numba,numba/numba,stonebig/numba,sklam/numba,seibert/numba,jriehl/numba,cpcloud/numba,gmarkall/numba,seibert/numba,gmarkall/numba,numba/numba,stuartarchibald/numba,IntelLabs/numba,numba/numba,numba/numba,cpcloud/numba,jriehl/numba,seibert/numba,seibert/numba,sklam/numba,gmarkall/numba,gmarkall/numba,stonebig/numba,stuartarchibald/numba,stuartarchibald/numba,jriehl/numba,IntelLabs/numba