[docs] [issue27589] asyncio doc: issue in as_completed() doc

[Hynek Schlawack]

Hynek Schlawack added the comment:

More explicitly:

The doc sells the function short.  If you have a bunch of futures and want to know as soon as one of them is ready: this is the function for you.

The only hint that this is the actual behavior comes from the *name* of the function; not the documentation.

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nosy: +hynek

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<http://bugs.python.org/issue27589>
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