Update nest-asyncio/README.md

nest-asyncio/README.md

@@ -14,6 +14,9 @@ asyncio.run = loop.run_until_complete
 async def hello():
     async def world(): print('hello')
     asyncio.run(world()) or print('world')
-asyncio.run(hello()) # OK
+asyncio.run(hello())
-''
+"""
+hello
+world
+"""
 ```