Add docstring to new module
Add docstring to new module

Co-Authored-By: adrn <3738087e476317196ac2db7cf211c8325d8d8040@gmail.com>
lpsinger/astropy,astropy/astropy,StuartLittlefair/astropy,larrybradley/astropy,bsipocz/astropy,MSeifert04/astropy,saimn/astropy,aleksandr-bakanov/astropy,astropy/astropy,lpsinger/astropy,mhvk/astropy,StuartLittlefair/astropy,mhvk/astropy,MSeifert04/astropy,dhomeier/astropy,dhomeier/astropy,pllim/astropy,saimn/astropy,dhomeier/astropy,MSeifert04/astropy,mhvk/astropy,astropy/astropy,larrybradley/astropy,mhvk/astropy,stargaser/astropy,lpsinger/astropy,larrybradley/astropy,pllim/astropy,mhvk/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,StuartLittlefair/astropy,dhomeier/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,pllim/astropy,MSeifert04/astropy,lpsinger/astropy,bsipocz/astropy,astropy/astropy,saimn/astropy,dhomeier/astropy,saimn/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,pllim/astropy,stargaser/astropy,saimn/astropy,pllim/astropy,larrybradley/astropy,StuartLittlefair/astropy,larrybradley/astropy,astropy/astropy,stargaser/astropy,stargaser/astropy