Add test of reading with header_start=None for NoHeader
Add test of reading with header_start=None for NoHeader

aleksandr-bakanov/astropy,joergdietrich/astropy,kelle/astropy,mhvk/astropy,lpsinger/astropy,AustereCuriosity/astropy,stargaser/astropy,tbabej/astropy,dhomeier/astropy,lpsinger/astropy,MSeifert04/astropy,saimn/astropy,larrybradley/astropy,funbaker/astropy,pllim/astropy,dhomeier/astropy,stargaser/astropy,mhvk/astropy,joergdietrich/astropy,AustereCuriosity/astropy,astropy/astropy,kelle/astropy,larrybradley/astropy,pllim/astropy,astropy/astropy,DougBurke/astropy,joergdietrich/astropy,tbabej/astropy,dhomeier/astropy,StuartLittlefair/astropy,larrybradley/astropy,lpsinger/astropy,stargaser/astropy,astropy/astropy,lpsinger/astropy,astropy/astropy,kelle/astropy,bsipocz/astropy,StuartLittlefair/astropy,mhvk/astropy,saimn/astropy,mhvk/astropy,tbabej/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,saimn/astropy,AustereCuriosity/astropy,pllim/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,DougBurke/astropy,larrybradley/astropy,kelle/astropy,funbaker/astropy,stargaser/astropy,funbaker/astropy,lpsinger/astropy,larrybradley/astropy,bsipocz/astropy,mhvk/astropy,DougBurke/astropy,saimn/astropy,pllim/astropy,tbabej/astropy,dhomeier/astropy,tbabej/astropy,astropy/astropy,pllim/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,AustereCuriosity/astropy,joergdietrich/astropy,funbaker/astropy,bsipocz/astropy,StuartLittlefair/astropy,bsipocz/astropy,joergdietrich/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,DougBurke/astropy,kelle/astropy,AustereCuriosity/astropy,saimn/astropy,dhomeier/astropy