DOC: interpolate: add actual smoothing condition for `UnivariateSpline`
DOC: interpolate: add actual smoothing condition for `UnivariateSpline`

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