fix doc_example --> doc_examples and minor grammar
fix doc_example --> doc_examples and minor grammar

Co-authored-by: Graham Markall <86e2b45e0e0bdcc23eddfa66ab0162cb095b788e@users.noreply.github.com>
numba/numba,cpcloud/numba,cpcloud/numba,numba/numba,cpcloud/numba,IntelLabs/numba,seibert/numba,cpcloud/numba,numba/numba,seibert/numba,IntelLabs/numba,seibert/numba,numba/numba,seibert/numba,numba/numba,IntelLabs/numba,IntelLabs/numba,IntelLabs/numba,cpcloud/numba,seibert/numba