wait(): mention that the future sequence must not be empty
wait(): mention that the future sequence must not be empty

vxgmichel/asyncio,jashandeep-sohi/asyncio,jashandeep-sohi/asyncio,gsb-eng/asyncio,gvanrossum/asyncio,1st1/asyncio,gvanrossum/asyncio,fallen/asyncio,Martiusweb/asyncio,vxgmichel/asyncio,fallen/asyncio,1st1/asyncio,Martiusweb/asyncio,haypo/trollius,manipopopo/asyncio,fallen/asyncio,haypo/trollius,gsb-eng/asyncio,1st1/asyncio,manipopopo/asyncio,manipopopo/asyncio,ajdavis/asyncio,ajdavis/asyncio,jashandeep-sohi/asyncio,haypo/trollius,vxgmichel/asyncio,ajdavis/asyncio,gvanrossum/asyncio,gsb-eng/asyncio,Martiusweb/asyncio