add pr number to changelog
add pr number to changelog

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