Restore `alt` after it is set
Restore `alt` after it is set

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