change implementation in SkyCoord initializer for list input to use is_equivalent_frame
change implementation in SkyCoord initializer for list input to use is_equivalent_frame

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