asyncio.test_tasks: Fix test_env_var_debug to use correct asyncio module

--HG--
branch : 3.4
Null merge
Issue #17462: Add a paragraph about advantages of argparse over optparse.

Patch by Anastasia Filatova.

--HG--
branch : 3.4
Issue #17462: Add a paragraph about advantages of argparse over optparse.

Patch by Anastasia Filatova.
os: Include posix functions in os.__all__. Closes issue #18554.

Patch by Ronald Oussoren.
tempfile: Fix docstring. Issue #21397, patch by R. David Murray.

--HG--
branch : 3.4
tempfile: Fix docstring. Issue #21397, patch by R. David Murray.
null merge
Issue #5309: distutils' build and build_ext commands now accept a ``-j``
option to enable parallel building of extension modules.
inspect: Fix getsource() to support decorated functions.

Issue #1764286. Patch by Claudiu Popa.
Issue #16324: _charset parameter of MIMEText now also accepts email.charset.Charset instances.

Initial patch by Claude Paroz.