DOC: stats: tweak the Moyal distribution docstring (#8331)
DOC: stats: tweak the Moyal distribution docstring (#8331)

Fix the math typesetting + small tweaks for the layout.
perimosocordiae/scipy,zerothi/scipy,pizzathief/scipy,mdhaber/scipy,rgommers/scipy,aarchiba/scipy,endolith/scipy,andyfaff/scipy,pizzathief/scipy,anntzer/scipy,pizzathief/scipy,aarchiba/scipy,endolith/scipy,perimosocordiae/scipy,zerothi/scipy,person142/scipy,rgommers/scipy,vigna/scipy,perimosocordiae/scipy,jor-/scipy,matthew-brett/scipy,anntzer/scipy,ilayn/scipy,gertingold/scipy,anntzer/scipy,WarrenWeckesser/scipy,arokem/scipy,anntzer/scipy,pizzathief/scipy,mdhaber/scipy,lhilt/scipy,anntzer/scipy,grlee77/scipy,vigna/scipy,tylerjereddy/scipy,nmayorov/scipy,matthew-brett/scipy,aeklant/scipy,pizzathief/scipy,matthew-brett/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,jor-/scipy,Stefan-Endres/scipy,lhilt/scipy,jor-/scipy,andyfaff/scipy,mdhaber/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,aarchiba/scipy,e-q/scipy,andyfaff/scipy,rgommers/scipy,e-q/scipy,scipy/scipy,perimosocordiae/scipy,jor-/scipy,WarrenWeckesser/scipy,lhilt/scipy,aeklant/scipy,gertingold/scipy,andyfaff/scipy,mdhaber/scipy,Eric89GXL/scipy,jamestwebber/scipy,e-q/scipy,andyfaff/scipy,jamestwebber/scipy,nmayorov/scipy,mdhaber/scipy,person142/scipy,nmayorov/scipy,zerothi/scipy,Eric89GXL/scipy,Eric89GXL/scipy,lhilt/scipy,zerothi/scipy,Stefan-Endres/scipy,jor-/scipy,nmayorov/scipy,anntzer/scipy,scipy/scipy,grlee77/scipy,grlee77/scipy,vigna/scipy,scipy/scipy,ilayn/scipy,zerothi/scipy,arokem/scipy,perimosocordiae/scipy,endolith/scipy,rgommers/scipy,Eric89GXL/scipy,jamestwebber/scipy,person142/scipy,ilayn/scipy,gfyoung/scipy,andyfaff/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,gertingold/scipy,scipy/scipy,jamestwebber/scipy,endolith/scipy,tylerjereddy/scipy,person142/scipy,gfyoung/scipy,scipy/scipy,ilayn/scipy,endolith/scipy,vigna/scipy,e-q/scipy,matthew-brett/scipy,gertingold/scipy,WarrenWeckesser/scipy,lhilt/scipy,gfyoung/scipy,aarchiba/scipy,Eric89GXL/scipy,Stefan-Endres/scipy,person142/scipy,arokem/scipy,endolith/scipy,vigna/scipy,mdhaber/scipy,aeklant/scipy,aeklant/scipy,Stefan-Endres/scipy,grlee77/scipy,aeklant/scipy,gfyoung/scipy,arokem/scipy,e-q/scipy,Stefan-Endres/scipy,ilayn/scipy,ilayn/scipy,tylerjereddy/scipy,scipy/scipy,grlee77/scipy,gertingold/scipy,aarchiba/scipy,nmayorov/scipy,WarrenWeckesser/scipy,gfyoung/scipy,jamestwebber/scipy,matthew-brett/scipy,rgommers/scipy,arokem/scipy,tylerjereddy/scipy,zerothi/scipy