Fix test_stdin_broken_pipe(): drain() is not a coroutine
Fix test_stdin_broken_pipe(): drain() is not a coroutine

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