decorators of test.support, run the test if the platform matchs!

test.support, run the test if the platform matchs!

Use also os.get_inheritable() instead of fcntl() to check the inheritable flag
(FD_CLOEXEC).

descriptor

Fix compilation warnings on Windows (Visual C++) like: "_sre.c(3121): warning
C4018: '>' : signed/unsigned mismatch".

_validate_outer() ensures that groups >= 0, so _validate_inner() can cast
groups to size_t.

'long', possible loss of data" in delta_new(), use an explicit cast from double
to long

PATH_MAX is not available on "MIPS IRIX 6.5.30 [SB] 3.x" buildbot

are now created non-inheritable; add functions os.get/set_inheritable(),
os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().

error messages and comments.

error messages and comments.

filenames anymore on Windows.

"Issue #18408: PyObject_Str(), PyObject_Repr() and type_call() now fail with an
assertion error if they are called with an exception set (PyErr_Occurred()).

As PyEval_EvalFrameEx(), they may clear the current exception and so the caller
looses its exception."

 * Catch PyFile_WriteString() and PyFile_WriteObject() errors
 * Clear the current exception on _PyObject_GetAttrId() failure
 * Use PyUnicode_CompareWithASCIIString() and PyFile_WriteObject() instead of
   _PyUnicode_AsString() and strcmp() to avoid Unicode encoding error. stderr
   has a more tolerant error handler than utf-8/strict.

So it can be called even if an exception was raised

XMLParser configures expat to report attributes in a list (ordered_attributes),
so only _start_list is needed. Rename it to _start and kill _start.

Using ``method`` markup because the method is on a callback object, not an
explicitly documented method. :meth: markup creates links within the current
class which is incorrect.

In addition, indent the paragraph correctly.

Issue #18808: Non-daemon threads are now automatically joined when a sub-interpreter is shutdown (it would previously dump a fatal error).

preexec_fn callback, which may open file descriptors.

preexec_fn callback, which may open file descriptors.