s/buffer/memoryview/
s/buffer/memoryview/

(But in the matrix store tests, `value` is never an instance of `memoryview`.)

annapowellsmith/openpresc,annapowellsmith/openpresc,ebmdatalab/openprescribing,ebmdatalab/openprescribing,annapowellsmith/openpresc,annapowellsmith/openpresc,ebmdatalab/openprescribing,ebmdatalab/openprescribing