* test_aswidechar() => unicode_aswidechar()
 * test_aswidecharstring() => unicode_aswidecharstring()

UTF-16 surrogate pairs by single non-BMP characters for 16 bits Py_UNICODE
and 32 bits wchar_t (eg. Linux in narrow build).

And write unit tests for PyUnicode_AsWideChar() and PyUnicode_AsWideCharString().

Bug report and fix by Thomas Guettler.

This fixes a regression noticed by bzr, introduced by issue #9324.

before passing it to the system asctime.  Patch by MunSic Jeong.

Issue #9599:  Further accuracy tweaks to loghelper.  For an integer n that's small enough to be converted to a float without overflow, log(n) is now computed as log(float(n)), and similarly for log10.

And the codec name is normalized.

Redecode the filenames of:

 - all modules: __file__ and __path__ attributes
 - all code objects: co_filename attribute
 - sys.path
 - sys.meta_path
 - sys.executable
 - sys.path_importer_cache (keys)

Keep weak references to all code objects until initfsencoding() is called, to
be able to redecode co_filename attribute of all code objects.

now conforms to the philosophy of bytes and unicode separation in Python 3.
A test suite has also been added.

r85073 changed the importing in wintypes to not use *, so the previous
usage here became even more incorrect.

 * Convert unicode to wide character string before creating the PyCapsule
   object
 * Catch integer overflow
 * Avoid useless memset()
 * Prepare the support of surrogates

Allocate memory with PyMem_Alloc() instead of the PyBytes API. Prepare the
surrogates support.

It simplifies the code and prepare the surrogates support.

Don't truncate path if it is too long anymore, and allocate fewer memory (but
allocate it on the heap, not on the stack).

Use the same behaviour than Python 2.7.

lines variable was not set on IOError