rendercheck --version (return code: 0)
rendercheck 1.4
rendercheck --help (return code: 1)
rendercheck: unrecognized option '--help'
usage: rendercheck [-d|--display display] [-v|--verbose]
[-t test1,test2,...] [-o op1,op2,...] [-f format1,format2,...]
[--sync] [--minimalrendering] [--version]
Available tests: fill,dcoords,scoords,mcoords,tscoords,
tmcoords,blend,composite,cacomposite,gradients,repeat,triangles,
bug7366