Add comment to clarify `rtol` setting in `_NonCanonicalMixin.spmatrix`.
Add comment to clarify `rtol` setting in `_NonCanonicalMixin.spmatrix`.

pizzathief/scipy,gfyoung/scipy,nmayorov/scipy,anielsen001/scipy,argriffing/scipy,surhudm/scipy,lhilt/scipy,bkendzior/scipy,zerothi/scipy,andyfaff/scipy,gdooper/scipy,kalvdans/scipy,pbrod/scipy,e-q/scipy,haudren/scipy,pizzathief/scipy,person142/scipy,anntzer/scipy,anielsen001/scipy,andyfaff/scipy,arokem/scipy,behzadnouri/scipy,mikebenfield/scipy,mikebenfield/scipy,jjhelmus/scipy,e-q/scipy,maniteja123/scipy,josephcslater/scipy,anntzer/scipy,lhilt/scipy,Stefan-Endres/scipy,Newman101/scipy,matthewalbani/scipy,pbrod/scipy,befelix/scipy,Eric89GXL/scipy,kleskjr/scipy,apbard/scipy,mdhaber/scipy,haudren/scipy,person142/scipy,apbard/scipy,tylerjereddy/scipy,surhudm/scipy,aeklant/scipy,WarrenWeckesser/scipy,kalvdans/scipy,Gillu13/scipy,pyramania/scipy,lhilt/scipy,jamestwebber/scipy,pizzathief/scipy,jamestwebber/scipy,andyfaff/scipy,nmayorov/scipy,endolith/scipy,perimosocordiae/scipy,zerothi/scipy,maniteja123/scipy,aarchiba/scipy,nonhermitian/scipy,dominicelse/scipy,bkendzior/scipy,person142/scipy,aeklant/scipy,zerothi/scipy,sriki18/scipy,ilayn/scipy,rgommers/scipy,grlee77/scipy,Newman101/scipy,matthewalbani/scipy,pyramania/scipy,pbrod/scipy,jamestwebber/scipy,Eric89GXL/scipy,perimosocordiae/scipy,jjhelmus/scipy,mikebenfield/scipy,gdooper/scipy,gertingold/scipy,lhilt/scipy,gertingold/scipy,dominicelse/scipy,nonhermitian/scipy,niknow/scipy,pbrod/scipy,matthew-brett/scipy,sriki18/scipy,person142/scipy,apbard/scipy,pschella/scipy,jakevdp/scipy,dominicelse/scipy,sriki18/scipy,pschella/scipy,Newman101/scipy,aarchiba/scipy,aeklant/scipy,maniteja123/scipy,matthewalbani/scipy,argriffing/scipy,niknow/scipy,kalvdans/scipy,zerothi/scipy,aarchiba/scipy,pbrod/scipy,rgommers/scipy,endolith/scipy,matthew-brett/scipy,anielsen001/scipy,gdooper/scipy,dominicelse/scipy,jakevdp/scipy,jor-/scipy,WarrenWeckesser/scipy,vigna/scipy,jor-/scipy,mdhaber/scipy,mdhaber/scipy,scipy/scipy,Eric89GXL/scipy,arokem/scipy,behzadnouri/scipy,zerothi/scipy,jakevdp/scipy,Gillu13/scipy,mikebenfield/scipy,befelix/scipy,WarrenWeckesser/scipy,Newman101/scipy,kleskjr/scipy,ilayn/scipy,jamestwebber/scipy,woodscn/scipy,gdooper/scipy,jor-/scipy,Newman101/scipy,woodscn/scipy,josephcslater/scipy,haudren/scipy,grlee77/scipy,Stefan-Endres/scipy,lhilt/scipy,rgommers/scipy,tylerjereddy/scipy,tylerjereddy/scipy,matthewalbani/scipy,Stefan-Endres/scipy,behzadnouri/scipy,jakevdp/scipy,scipy/scipy,grlee77/scipy,Stefan-Endres/scipy,pyramania/scipy,Gillu13/scipy,mdhaber/scipy,dominicelse/scipy,mdhaber/scipy,gertingold/scipy,Eric89GXL/scipy,person142/scipy,grlee77/scipy,jor-/scipy,endolith/scipy,surhudm/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,pbrod/scipy,jjhelmus/scipy,nmayorov/scipy,matthewalbani/scipy,sriki18/scipy,behzadnouri/scipy,ilayn/scipy,rgommers/scipy,endolith/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,arokem/scipy,Eric89GXL/scipy,vigna/scipy,bkendzior/scipy,endolith/scipy,scipy/scipy,pizzathief/scipy,Newman101/scipy,andyfaff/scipy,ilayn/scipy,scipy/scipy,kleskjr/scipy,kalvdans/scipy,nmayorov/scipy,vigna/scipy,nonhermitian/scipy,gfyoung/scipy,e-q/scipy,argriffing/scipy,anielsen001/scipy,niknow/scipy,maniteja123/scipy,gdooper/scipy,perimosocordiae/scipy,nmayorov/scipy,anielsen001/scipy,haudren/scipy,niknow/scipy,sriki18/scipy,bkendzior/scipy,grlee77/scipy,Gillu13/scipy,rgommers/scipy,matthew-brett/scipy,scipy/scipy,woodscn/scipy,zerothi/scipy,woodscn/scipy,Eric89GXL/scipy,josephcslater/scipy,vigna/scipy,bkendzior/scipy,gfyoung/scipy,aarchiba/scipy,jor-/scipy,apbard/scipy,anntzer/scipy,e-q/scipy,andyfaff/scipy,e-q/scipy,woodscn/scipy,matthew-brett/scipy,behzadnouri/scipy,surhudm/scipy,apbard/scipy,jjhelmus/scipy,haudren/scipy,nonhermitian/scipy,woodscn/scipy,nonhermitian/scipy,surhudm/scipy,maniteja123/scipy,pizzathief/scipy,niknow/scipy,befelix/scipy,pyramania/scipy,behzadnouri/scipy,kalvdans/scipy,WarrenWeckesser/scipy,surhudm/scipy,argriffing/scipy,pschella/scipy,kleskjr/scipy,jamestwebber/scipy,josephcslater/scipy,pschella/scipy,jakevdp/scipy,gertingold/scipy,matthew-brett/scipy,WarrenWeckesser/scipy,arokem/scipy,aeklant/scipy,befelix/scipy,pyramania/scipy,josephcslater/scipy,kleskjr/scipy,Gillu13/scipy,mdhaber/scipy,ilayn/scipy,arokem/scipy,anntzer/scipy,anntzer/scipy,niknow/scipy,argriffing/scipy,haudren/scipy,gfyoung/scipy,gfyoung/scipy,pschella/scipy,jjhelmus/scipy,befelix/scipy,Gillu13/scipy,aarchiba/scipy,mikebenfield/scipy,perimosocordiae/scipy,sriki18/scipy,ilayn/scipy,anntzer/scipy,anielsen001/scipy,gertingold/scipy,andyfaff/scipy,argriffing/scipy,WarrenWeckesser/scipy,kleskjr/scipy,scipy/scipy,aeklant/scipy,endolith/scipy,tylerjereddy/scipy,vigna/scipy,maniteja123/scipy,perimosocordiae/scipy