[issue20648] 3.4 cherry-pick: multiple changesets for asyncio

[STINNER Victor]

STINNER Victor added the comment:

changeset:   89264:2406566d2c04
tag:         tip
user:        Victor Stinner <victor.stinner at gmail.com>
date:        Wed Feb 19 01:40:41 2014 +0100
files:       Lib/asyncio/proactor_events.py Lib/asyncio/selector_events.py Lib/asyncio/unix_events.py Lib/test/test_asyncio/test_proactor_events.py Lib/test/test_asyncio/test_s
description:
asyncio, Tulip issue 139: Improve error messages on "fatal errors"

Mention if the error was caused by a read or a write, and be more specific on
the object (ex: "pipe transport" instead of "transport").

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20648>
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