Ensure string conversion is at least as fast as previously.
Ensure string conversion is at least as fast as previously.

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