DOC: optimize: A few tweaks of the examples in the curve_fit docstring:
DOC: optimize: A few tweaks of the examples in the curve_fit docstring:

* Set the numpy random seed.
* Show `popt` in the terminal.
* Change the bounds of the constrained example so the bounds affect the result.
* Include the fit parameters in plot labels.

jamestwebber/scipy,apbard/scipy,Eric89GXL/scipy,gfyoung/scipy,matthew-brett/scipy,befelix/scipy,pizzathief/scipy,gertingold/scipy,perimosocordiae/scipy,ilayn/scipy,Eric89GXL/scipy,endolith/scipy,josephcslater/scipy,matthew-brett/scipy,jamestwebber/scipy,nmayorov/scipy,gertingold/scipy,aeklant/scipy,anntzer/scipy,Stefan-Endres/scipy,matthew-brett/scipy,arokem/scipy,mdhaber/scipy,Stefan-Endres/scipy,zerothi/scipy,mdhaber/scipy,apbard/scipy,apbard/scipy,endolith/scipy,aeklant/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,gertingold/scipy,andyfaff/scipy,WarrenWeckesser/scipy,aarchiba/scipy,scipy/scipy,rgommers/scipy,Stefan-Endres/scipy,endolith/scipy,endolith/scipy,pbrod/scipy,nmayorov/scipy,perimosocordiae/scipy,rgommers/scipy,matthew-brett/scipy,person142/scipy,befelix/scipy,ilayn/scipy,pbrod/scipy,e-q/scipy,perimosocordiae/scipy,e-q/scipy,jor-/scipy,andyfaff/scipy,aarchiba/scipy,person142/scipy,ilayn/scipy,pbrod/scipy,scipy/scipy,nmayorov/scipy,arokem/scipy,aeklant/scipy,pizzathief/scipy,jor-/scipy,rgommers/scipy,endolith/scipy,tylerjereddy/scipy,perimosocordiae/scipy,pizzathief/scipy,lhilt/scipy,andyfaff/scipy,zerothi/scipy,mdhaber/scipy,apbard/scipy,befelix/scipy,vigna/scipy,gfyoung/scipy,tylerjereddy/scipy,grlee77/scipy,pbrod/scipy,rgommers/scipy,matthew-brett/scipy,nmayorov/scipy,aarchiba/scipy,WarrenWeckesser/scipy,vigna/scipy,anntzer/scipy,arokem/scipy,scipy/scipy,lhilt/scipy,zerothi/scipy,lhilt/scipy,gfyoung/scipy,anntzer/scipy,mdhaber/scipy,arokem/scipy,anntzer/scipy,anntzer/scipy,gfyoung/scipy,WarrenWeckesser/scipy,jor-/scipy,vigna/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,arokem/scipy,zerothi/scipy,aeklant/scipy,jamestwebber/scipy,Eric89GXL/scipy,person142/scipy,grlee77/scipy,grlee77/scipy,aeklant/scipy,Stefan-Endres/scipy,jor-/scipy,josephcslater/scipy,anntzer/scipy,mdhaber/scipy,e-q/scipy,aarchiba/scipy,ilayn/scipy,lhilt/scipy,mdhaber/scipy,tylerjereddy/scipy,zerothi/scipy,grlee77/scipy,scipy/scipy,person142/scipy,ilayn/scipy,andyfaff/scipy,josephcslater/scipy,rgommers/scipy,andyfaff/scipy,josephcslater/scipy,pizzathief/scipy,gfyoung/scipy,vigna/scipy,Eric89GXL/scipy,vigna/scipy,gertingold/scipy,WarrenWeckesser/scipy,andyfaff/scipy,WarrenWeckesser/scipy,scipy/scipy,ilayn/scipy,befelix/scipy,pizzathief/scipy,pbrod/scipy,e-q/scipy,perimosocordiae/scipy,gertingold/scipy,Eric89GXL/scipy,pbrod/scipy,grlee77/scipy,scipy/scipy,befelix/scipy,tylerjereddy/scipy,nmayorov/scipy,josephcslater/scipy,apbard/scipy,aarchiba/scipy,jamestwebber/scipy,e-q/scipy,Eric89GXL/scipy,person142/scipy,Stefan-Endres/scipy,endolith/scipy,jamestwebber/scipy,zerothi/scipy,jor-/scipy,lhilt/scipy