DOC: minor formatting fixes for pinv/pinv2/pinvh docstrings.
DOC: minor formatting fixes for pinv/pinv2/pinvh docstrings.

Addresses remaining comments on gh-8743.

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