Update the testing guidelines docs [skip ci]
Update the testing guidelines docs [skip ci]

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