Run some doctests on verification of io.fits
Run some doctests on verification of io.fits

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