Fix one incorrect assertTrue(), and clarify a few things.
Fix one incorrect assertTrue(), and clarify a few things.

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