Fix doctests for Python3.6 test on TravisCI
Fix doctests for Python3.6 test on TravisCI

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