Updating the description of parameter nnz
Updating the description of parameter nnz

This is in accordance will pull request #10141
aarchiba/scipy,WarrenWeckesser/scipy,endolith/scipy,pizzathief/scipy,nmayorov/scipy,WarrenWeckesser/scipy,vigna/scipy,nmayorov/scipy,vigna/scipy,arokem/scipy,e-q/scipy,mdhaber/scipy,endolith/scipy,grlee77/scipy,zerothi/scipy,matthew-brett/scipy,jor-/scipy,gertingold/scipy,gertingold/scipy,scipy/scipy,jamestwebber/scipy,jamestwebber/scipy,lhilt/scipy,nmayorov/scipy,jor-/scipy,aarchiba/scipy,e-q/scipy,WarrenWeckesser/scipy,ilayn/scipy,gertingold/scipy,Eric89GXL/scipy,pizzathief/scipy,tylerjereddy/scipy,scipy/scipy,matthew-brett/scipy,Eric89GXL/scipy,jamestwebber/scipy,Stefan-Endres/scipy,aeklant/scipy,mdhaber/scipy,lhilt/scipy,zerothi/scipy,mdhaber/scipy,Stefan-Endres/scipy,matthew-brett/scipy,tylerjereddy/scipy,ilayn/scipy,jor-/scipy,person142/scipy,WarrenWeckesser/scipy,person142/scipy,e-q/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,anntzer/scipy,tylerjereddy/scipy,vigna/scipy,anntzer/scipy,anntzer/scipy,mdhaber/scipy,pizzathief/scipy,andyfaff/scipy,grlee77/scipy,endolith/scipy,scipy/scipy,Stefan-Endres/scipy,ilayn/scipy,WarrenWeckesser/scipy,zerothi/scipy,aarchiba/scipy,anntzer/scipy,grlee77/scipy,mdhaber/scipy,aeklant/scipy,aarchiba/scipy,scipy/scipy,matthew-brett/scipy,rgommers/scipy,aeklant/scipy,jor-/scipy,ilayn/scipy,Eric89GXL/scipy,ilayn/scipy,e-q/scipy,andyfaff/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,zerothi/scipy,endolith/scipy,jamestwebber/scipy,andyfaff/scipy,e-q/scipy,vigna/scipy,person142/scipy,lhilt/scipy,Eric89GXL/scipy,lhilt/scipy,perimosocordiae/scipy,Eric89GXL/scipy,nmayorov/scipy,Stefan-Endres/scipy,aeklant/scipy,perimosocordiae/scipy,zerothi/scipy,Stefan-Endres/scipy,arokem/scipy,andyfaff/scipy,arokem/scipy,rgommers/scipy,tylerjereddy/scipy,aarchiba/scipy,scipy/scipy,tylerjereddy/scipy,grlee77/scipy,perimosocordiae/scipy,lhilt/scipy,endolith/scipy,arokem/scipy,nmayorov/scipy,gertingold/scipy,scipy/scipy,rgommers/scipy,jor-/scipy,grlee77/scipy,person142/scipy,person142/scipy,rgommers/scipy,perimosocordiae/scipy,vigna/scipy,rgommers/scipy,pizzathief/scipy,andyfaff/scipy,anntzer/scipy,endolith/scipy,matthew-brett/scipy,mdhaber/scipy,pizzathief/scipy,ilayn/scipy,anntzer/scipy,andyfaff/scipy,gertingold/scipy,zerothi/scipy,jamestwebber/scipy,Eric89GXL/scipy,arokem/scipy,aeklant/scipy