accept and return str instead of bytes arrays. Add some more tests.

zlib.decompress() anymore to be able to unload the module.

zlib.decompress() anymore to be able to unload the module.

to be able to unload the module.

packaging.util requires the env keyword.

Don't encode the path list

 * read: use tokenize.detect_encoding()
 * write: use 'utf-8'

Skip tests that require zlib in the packaging tests.  Also add a requires_zlib decorator to test.support.

We don't need to open the files in text mode just to create them (or update
their modification time).

build_scripts command of packaging now handles correctly non-ASCII path (path
to the Python executable). Open and write the script in binary mode, but ensure
that the shebang is decodable from UTF-8 and from the encoding of the script.

Open the file in binary mode or use UTF-8 encoding.

os.sendfile() test: fix "AttributeError: 'NoneType' object has no attribute 'Thread'" when running tests with --without-threads option.
reference: http://bugs.python.org/issue10882#msg136257

when the socket's timeout expires (it used to return None).