DOC: optimize: add an empty line to fix CI fails.
DOC: optimize: add an empty line to fix CI fails.

ilayn/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,mdhaber/scipy,scipy/scipy,ilayn/scipy,zerothi/scipy,mdhaber/scipy,mdhaber/scipy,scipy/scipy,rgommers/scipy,andyfaff/scipy,endolith/scipy,WarrenWeckesser/scipy,andyfaff/scipy,tylerjereddy/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,scipy/scipy,andyfaff/scipy,vigna/scipy,rgommers/scipy,mdhaber/scipy,matthew-brett/scipy,scipy/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,ilayn/scipy,rgommers/scipy,zerothi/scipy,matthew-brett/scipy,matthew-brett/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,endolith/scipy,anntzer/scipy,perimosocordiae/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,vigna/scipy,zerothi/scipy,scipy/scipy,zerothi/scipy,andyfaff/scipy,rgommers/scipy,endolith/scipy,anntzer/scipy,tylerjereddy/scipy,zerothi/scipy,mdhaber/scipy,vigna/scipy,anntzer/scipy,zerothi/scipy,mdhaber/scipy,WarrenWeckesser/scipy,ilayn/scipy,endolith/scipy,vigna/scipy,Stefan-Endres/scipy,anntzer/scipy,anntzer/scipy,vigna/scipy,tylerjereddy/scipy,anntzer/scipy,matthew-brett/scipy,ilayn/scipy,ilayn/scipy,scipy/scipy,Stefan-Endres/scipy,rgommers/scipy,andyfaff/scipy,endolith/scipy,perimosocordiae/scipy,andyfaff/scipy,tylerjereddy/scipy,perimosocordiae/scipy,matthew-brett/scipy,endolith/scipy