Minor updates to the testing documentation
Minor updates to the testing documentation

Signed-off-by: Aaron Franks <4cb1971f4c0a12cee57357102ab4f224879a7e6b@gmail.com>

dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder