DOC : interpolate add notes for x and y array sorted in decreasing order
DOC : interpolate add notes for x and y array sorted in decreasing order

Reviewed in gh-16496
L
rgommers/scipy,WarrenWeckesser/scipy,rgommers/scipy,rgommers/scipy,perimosocordiae/scipy,scipy/scipy,Stefan-Endres/scipy,endolith/scipy,endolith/scipy,anntzer/scipy,anntzer/scipy,endolith/scipy,rgommers/scipy,ilayn/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,anntzer/scipy,Stefan-Endres/scipy,scipy/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,andyfaff/scipy,anntzer/scipy,mdhaber/scipy,endolith/scipy,perimosocordiae/scipy,perimosocordiae/scipy,scipy/scipy,andyfaff/scipy,endolith/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,andyfaff/scipy,anntzer/scipy,ilayn/scipy,andyfaff/scipy,ilayn/scipy,WarrenWeckesser/scipy,mdhaber/scipy,mdhaber/scipy,andyfaff/scipy,anntzer/scipy,scipy/scipy,perimosocordiae/scipy,mdhaber/scipy,scipy/scipy,WarrenWeckesser/scipy,Stefan-Endres/scipy,ilayn/scipy,endolith/scipy,ilayn/scipy,Stefan-Endres/scipy,scipy/scipy,Stefan-Endres/scipy,mdhaber/scipy,andyfaff/scipy,rgommers/scipy,ilayn/scipy,mdhaber/scipy