fix docstrings
fix docstrings

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