Add docstring for WCS.has_distortion
Add docstring for WCS.has_distortion

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