Parser/asdl_c.py was missed in commit 7109f31300fb when _Py_identifier
was replaced with _Py_IDENTIFIER.  Thanks to Eric Snow for the patch.

Patch written by Stefan Behnel.

Thanks to Francisco Martín Brugué for the patch.

The bug reported expected distutils to create an __init__.py file for a
project using only C extension modules.  IMO, how Python imports
packages and submodules is well documented, and it’s never suggested
that distutils might create an __init__.py file, so I’m adding this
clarification to the packaging docs but won’t backport unless other
people tell me they shared the same wrong expectation.

Thanks to Mike Hoy for his help with the patch.

I’ve made more edits than the bug report suggested to make sure the
generated setup script is compatible with many Python versions; a
comment in the source explains that in detail.

The cfg_to_args function uses old 2.x idioms like codecs.open and
RawConfigParser.readfp because I want the setup.py generated by packaging and
distutils2 to be the same.  Most users won’t see the deprecation warning and I
ignore it in the test suite.

Thanks to David Barnett for the report and original patch.

of bytes and bytearray objects now accept an integer between 0 and 255
as their first argument.  Patch by Petri Lehtinen.

(as in import.c)