TST: netcdf: explicit mmap=True in test (#8687)
TST: netcdf: explicit mmap=True in test (#8687)

The mmap= doesn't default to true on pypy.
Eric89GXL/scipy,zerothi/scipy,andyfaff/scipy,jamestwebber/scipy,vigna/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,aarchiba/scipy,person142/scipy,ilayn/scipy,arokem/scipy,rgommers/scipy,anntzer/scipy,jamestwebber/scipy,zerothi/scipy,WarrenWeckesser/scipy,zerothi/scipy,aarchiba/scipy,tylerjereddy/scipy,lhilt/scipy,vigna/scipy,andyfaff/scipy,tylerjereddy/scipy,rgommers/scipy,jamestwebber/scipy,ilayn/scipy,jor-/scipy,grlee77/scipy,mdhaber/scipy,person142/scipy,mdhaber/scipy,endolith/scipy,jor-/scipy,Eric89GXL/scipy,rgommers/scipy,scipy/scipy,e-q/scipy,scipy/scipy,Stefan-Endres/scipy,scipy/scipy,rgommers/scipy,endolith/scipy,lhilt/scipy,anntzer/scipy,endolith/scipy,WarrenWeckesser/scipy,aarchiba/scipy,perimosocordiae/scipy,person142/scipy,mdhaber/scipy,nmayorov/scipy,anntzer/scipy,gfyoung/scipy,zerothi/scipy,arokem/scipy,grlee77/scipy,aeklant/scipy,Eric89GXL/scipy,person142/scipy,aarchiba/scipy,Eric89GXL/scipy,perimosocordiae/scipy,pizzathief/scipy,mdhaber/scipy,aeklant/scipy,nmayorov/scipy,jor-/scipy,gertingold/scipy,e-q/scipy,Stefan-Endres/scipy,jor-/scipy,ilayn/scipy,e-q/scipy,gertingold/scipy,e-q/scipy,arokem/scipy,pizzathief/scipy,ilayn/scipy,ilayn/scipy,endolith/scipy,gfyoung/scipy,mdhaber/scipy,aeklant/scipy,nmayorov/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,ilayn/scipy,scipy/scipy,anntzer/scipy,zerothi/scipy,andyfaff/scipy,gfyoung/scipy,vigna/scipy,aeklant/scipy,WarrenWeckesser/scipy,nmayorov/scipy,perimosocordiae/scipy,gertingold/scipy,Eric89GXL/scipy,matthew-brett/scipy,andyfaff/scipy,pizzathief/scipy,endolith/scipy,scipy/scipy,lhilt/scipy,e-q/scipy,nmayorov/scipy,jor-/scipy,matthew-brett/scipy,pizzathief/scipy,aarchiba/scipy,tylerjereddy/scipy,zerothi/scipy,perimosocordiae/scipy,arokem/scipy,andyfaff/scipy,grlee77/scipy,anntzer/scipy,tylerjereddy/scipy,mdhaber/scipy,anntzer/scipy,grlee77/scipy,matthew-brett/scipy,gfyoung/scipy,pizzathief/scipy,grlee77/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,rgommers/scipy,endolith/scipy,matthew-brett/scipy,person142/scipy,lhilt/scipy,perimosocordiae/scipy,scipy/scipy,gertingold/scipy,jamestwebber/scipy,lhilt/scipy,andyfaff/scipy,WarrenWeckesser/scipy,arokem/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,tylerjereddy/scipy,jamestwebber/scipy,aeklant/scipy,gertingold/scipy,gfyoung/scipy,vigna/scipy,vigna/scipy,matthew-brett/scipy