MAINT: optimize: Fix a really long line.
MAINT: optimize: Fix a really long line.

Fix a really long line, and while I'm at it, change from
using the .format() method to f-strings.

grlee77/scipy,andyfaff/scipy,perimosocordiae/scipy,zerothi/scipy,mdhaber/scipy,scipy/scipy,anntzer/scipy,anntzer/scipy,andyfaff/scipy,anntzer/scipy,mdhaber/scipy,e-q/scipy,tylerjereddy/scipy,anntzer/scipy,andyfaff/scipy,ilayn/scipy,ilayn/scipy,anntzer/scipy,rgommers/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,scipy/scipy,e-q/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,endolith/scipy,vigna/scipy,Eric89GXL/scipy,scipy/scipy,tylerjereddy/scipy,Eric89GXL/scipy,endolith/scipy,perimosocordiae/scipy,Eric89GXL/scipy,WarrenWeckesser/scipy,rgommers/scipy,ilayn/scipy,vigna/scipy,Eric89GXL/scipy,zerothi/scipy,matthew-brett/scipy,Stefan-Endres/scipy,anntzer/scipy,e-q/scipy,Stefan-Endres/scipy,andyfaff/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,ilayn/scipy,rgommers/scipy,mdhaber/scipy,grlee77/scipy,e-q/scipy,endolith/scipy,scipy/scipy,mdhaber/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,zerothi/scipy,endolith/scipy,zerothi/scipy,zerothi/scipy,zerothi/scipy,vigna/scipy,ilayn/scipy,Eric89GXL/scipy,grlee77/scipy,mdhaber/scipy,ilayn/scipy,grlee77/scipy,rgommers/scipy,scipy/scipy,tylerjereddy/scipy,vigna/scipy,matthew-brett/scipy,vigna/scipy,matthew-brett/scipy,Stefan-Endres/scipy,matthew-brett/scipy,endolith/scipy,Eric89GXL/scipy,mdhaber/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,andyfaff/scipy,scipy/scipy,perimosocordiae/scipy,e-q/scipy,matthew-brett/scipy,Stefan-Endres/scipy,grlee77/scipy,endolith/scipy,perimosocordiae/scipy,rgommers/scipy,Stefan-Endres/scipy,andyfaff/scipy