Error in example (examples/fake_server.py)

[prostomarkeloff]

Long story short

I tried test a example in examples folder, and ... got error :(

Expected behaviour

Server should work normally.

Actual behaviour

Traceback (most recent call last):
  File "examples/fake_server.py", line 116, in <module>
    loop.run_until_complete(main(loop))
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "examples/fake_server.py", line 98, in main
    fake_facebook = FakeFacebook()
TypeError: __init__() missing 1 required keyword-only argument: 'loop'

After add loop argument, i got this warning:

{'name': 'John Doe', 'id': '12345678901234567'}
/home/markeloffdev/projects/python/aiohttp/aiohttp/client.py:1037: RuntimeWarning: coroutine 'noop' was never awaited
  self._resp.release()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback
{'data': [{'name': 'Bill Doe', 'id': '233242342342'}, {'name': 'Mary Doe', 'id': '2342342343222'}, {'name': 'Alex Smith', 'id': '234234234344'}], 'paging': {'cursors': {'before': 'QVFIUjRtc2c5NEl0ajN', 'after': 'QVFIUlpFQWM0TmVuaDRad0dt'}, 'next': 'https://graph.facebook.com/v2.7/12345678901234567/friends?access_token=EAACEdEose0cB'}, 'summary': {'total_count': 3}}
Task was destroyed but it is pending!
task: <Task pending coro=<RequestHandler.start() running at /home/markeloffdev/projects/python/aiohttp/aiohttp/web_protocol.py:461> wait_for=<Future pending cb=[<TaskWakeupMethWrapper object at 0x7fd830c3a5b8>()]>>

Steps to reproduce

Try run examples/fake_server.py.

Your environment

aiohttp: 4.0.0a1
OS: Ubuntu 18.04
Python: 3.7.3

[prostomarkeloff]

Fixed in #4284