bpo-34613: document the correct value of limit argument of asyncio.StreamReader (GH-9121)


The default value of asyncio.StreamReader *limit* is `_DEFAULT_LIMIT` instead of `None`.

<!-- issue-number: [bpo-34613](https://www.bugs.python.org/issue34613) -->
https://bugs.python.org/issue34613
<!-- /issue-number -->
(cherry picked from commit b4ec36200a959da70eba94c19826446a8efdffdd)

Co-authored-by: Bram <cortex@worlddomination.be>
1 file changed