MAINT:  interpolate: test_fitpack: simplify splrep/splPrep/splev smoke tests
MAINT:  interpolate: test_fitpack: simplify splrep/splPrep/splev smoke tests

WarrenWeckesser/scipy,ilayn/scipy,ilayn/scipy,andyfaff/scipy,rgommers/scipy,scipy/scipy,andyfaff/scipy,mdhaber/scipy,anntzer/scipy,andyfaff/scipy,rgommers/scipy,mdhaber/scipy,scipy/scipy,ilayn/scipy,mdhaber/scipy,WarrenWeckesser/scipy,mdhaber/scipy,rgommers/scipy,endolith/scipy,endolith/scipy,scipy/scipy,Stefan-Endres/scipy,endolith/scipy,WarrenWeckesser/scipy,rgommers/scipy,andyfaff/scipy,perimosocordiae/scipy,mdhaber/scipy,endolith/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,anntzer/scipy,anntzer/scipy,perimosocordiae/scipy,endolith/scipy,scipy/scipy,scipy/scipy,ilayn/scipy,andyfaff/scipy,Stefan-Endres/scipy,scipy/scipy,anntzer/scipy,rgommers/scipy,andyfaff/scipy,Stefan-Endres/scipy,anntzer/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,endolith/scipy,anntzer/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,mdhaber/scipy,perimosocordiae/scipy,ilayn/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,ilayn/scipy