Recognize testsetup directive and omit content from documentation
Recognize testsetup directive and omit content from documentation

dpshelio/astropy-helpers,bsipocz/astropy-helpers,dpshelio/astropy-helpers,Cadair/astropy-helpers,astropy/astropy-helpers,Cadair/astropy-helpers,bsipocz/astropy-helpers,bsipocz/astropy-helpers,astropy/astropy-helpers