Ws example fix (#1193)
Ws example fix (#1193)

* Use 'aiohttp.web.MsgType' instead of depreceated 'aiohttp.web.WSMsgType' to fix import error in the web socket server example.

* Remove explicit loop specification for 'aiohttp.web.run_app' function in the web socket server example.

* Sort imports in the web socket server example script.

* Replace the 'MsgType' back with 'WSMsgType' as #1200 fixes the import error.

arthurdarcet/aiohttp,singulared/aiohttp,juliatem/aiohttp,z2v/aiohttp,panda73111/aiohttp,esaezgil/aiohttp,KeepSafe/aiohttp,pfreixes/aiohttp,alex-eri/aiohttp-1,Eyepea/aiohttp,rutsky/aiohttp,z2v/aiohttp,juliatem/aiohttp,alex-eri/aiohttp-1,panda73111/aiohttp,AraHaanOrg/aiohttp,KeepSafe/aiohttp,z2v/aiohttp,panda73111/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp,moden-py/aiohttp,alex-eri/aiohttp-1,esaezgil/aiohttp,moden-py/aiohttp,singulared/aiohttp,hellysmile/aiohttp,arthurdarcet/aiohttp,hellysmile/aiohttp,pfreixes/aiohttp,singulared/aiohttp,playpauseandstop/aiohttp,esaezgil/aiohttp,moden-py/aiohttp,AraHaanOrg/aiohttp,rutsky/aiohttp,arthurdarcet/aiohttp