[issue28516] contextlib.ExitStack.__enter__ has trivial but undocumented behavior

[Vidhya]

Vidhya <vidhya.friend at gmail.com> added the comment:

[Entry level contributor seeking guidance] If this is still open, I can update the document.

After reading all the above comments, planning to add 

"The __enter__ method returns the ExitStack instance, and performs no additional operations." 

at

https://docs.python.org/3/library/contextlib.html#contextlib.ExitStack.enter_context. 

Please let me know your thoughts.

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nosy: +vidhya

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue28516>
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