runner were run in an environment where the process inherited an ignore
setting for SIGINT.  Restore the SIGINT handler to the desired
KeyboardInterrupt raising one during that test.

runner were run in an environment where the process inherited an ignore
setting for SIGINT.  Restore the SIGINT handler to the desired
KeyboardInterrupt raising one during that test.

sizes.

sizes.

parsing.  Added more tests for regrtest's argument parsing.

in docstrings and comments.

in docstrings and comments.

Use less code by moving many of the steps from the initial
lookup into the main search loop.

Beautify the code but keep the overall logic unchanged.

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.