minor fix in client docs (#1119)
minor fix in client docs (#1119)


KeepSafe/aiohttp,singulared/aiohttp,rutsky/aiohttp,Eyepea/aiohttp,juliatem/aiohttp,z2v/aiohttp,moden-py/aiohttp,KeepSafe/aiohttp,jettify/aiohttp,arthurdarcet/aiohttp,panda73111/aiohttp,pfreixes/aiohttp,pfreixes/aiohttp,z2v/aiohttp,singulared/aiohttp,arthurdarcet/aiohttp,esaezgil/aiohttp,jettify/aiohttp,hellysmile/aiohttp,rutsky/aiohttp,hellysmile/aiohttp,esaezgil/aiohttp,alex-eri/aiohttp-1,panda73111/aiohttp,AraHaanOrg/aiohttp,AraHaanOrg/aiohttp,moden-py/aiohttp,alex-eri/aiohttp-1,singulared/aiohttp,playpauseandstop/aiohttp,z2v/aiohttp,jettify/aiohttp,panda73111/aiohttp,arthurdarcet/aiohttp,juliatem/aiohttp,KeepSafe/aiohttp,esaezgil/aiohttp,alex-eri/aiohttp-1,moden-py/aiohttp,rutsky/aiohttp