DOC: special: fix `special.factorial2` docstring inconsistency with code (#15592)
DOC: special: fix `special.factorial2` docstring inconsistency with code (#15592)


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