DOC: fix a formatting issue in the building FAQ doc page
DOC: fix a formatting issue in the building FAQ doc page

[ci skip]

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