Minor cleanup of CHANGES.rst formatting, add issue 1809
Minor cleanup of CHANGES.rst formatting, add issue 1809

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