fix py36 f-string format error
fix py36 f-string format error

stuartarchibald/numba,cpcloud/numba,seibert/numba,numba/numba,IntelLabs/numba,IntelLabs/numba,seibert/numba,IntelLabs/numba,stonebig/numba,stuartarchibald/numba,stuartarchibald/numba,stonebig/numba,stuartarchibald/numba,stuartarchibald/numba,cpcloud/numba,stonebig/numba,cpcloud/numba,numba/numba,seibert/numba,IntelLabs/numba,cpcloud/numba,numba/numba,cpcloud/numba,numba/numba,stonebig/numba,seibert/numba,seibert/numba,stonebig/numba,numba/numba,IntelLabs/numba