Fix typo reported (long ago) by Brett Cannon.
Fix typo reported (long ago) by Brett Cannon.

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