Apply comments from @eteq.
Apply comments from @eteq.

Move post-release section to after twine upload as @bsipocz suggested.

Fix formatting error. [docs only]

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