Update CLI example to use nested argparse
Update CLI example to use nested argparse

vaskalas/aiohttp,AraHaanOrg/aiohttp,rutsky/aiohttp,singulared/aiohttp,hellysmile/aiohttp,jashandeep-sohi/aiohttp,KeepSafe/aiohttp,jettify/aiohttp,moden-py/aiohttp,arthurdarcet/aiohttp,pfreixes/aiohttp,panda73111/aiohttp,esaezgil/aiohttp,KeepSafe/aiohttp,AraHaanOrg/aiohttp,vaskalas/aiohttp,hellysmile/aiohttp,alex-eri/aiohttp-1,juliatem/aiohttp,rutsky/aiohttp,jettify/aiohttp,panda73111/aiohttp,playpauseandstop/aiohttp,arthurdarcet/aiohttp,esaezgil/aiohttp,decentfox/aiohttp,z2v/aiohttp,alex-eri/aiohttp-1,moden-py/aiohttp,elastic-coders/aiohttp,elastic-coders/aiohttp,decentfox/aiohttp,panda73111/aiohttp,mind1master/aiohttp,alex-eri/aiohttp-1,mind1master/aiohttp,decentfox/aiohttp,jettify/aiohttp,arthurdarcet/aiohttp,juliatem/aiohttp,z2v/aiohttp,z2v/aiohttp,jashandeep-sohi/aiohttp,Eyepea/aiohttp,elastic-coders/aiohttp,singulared/aiohttp,mind1master/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp,vaskalas/aiohttp,jashandeep-sohi/aiohttp,esaezgil/aiohttp,singulared/aiohttp,pfreixes/aiohttp,moden-py/aiohttp