Intellisense missing items when using context managers

[DonJayamanne]

with open('log.log', 'a') as fs:
	fs.

Completion is missing write.

However it works when using open('log.log', 'a').write.

• OS - Mac
• Latest version of Language server https://pvsc.blob.core.windows.net/python-language-server/Python-Language-Server-osx-x64.0.1.18204.3.nupkg
• Works when using Jedi.

See here:

[MikhailArkhipov]

Looks like scraped _IOBase does not include write while typeshed does.

[MikhailArkhipov]

microsoft/PTVS#4614

[MikhailArkhipov]

microsoft/PTVS#4622