creation) mode.

close the binary file to fix a resource warning.

Flushing sys.stdout and sys.stderr in Py_FatalError() can call again
Py_FatalError(). Add a reentrant flag to detect this case and just abort at the
second call.

writer failed in BufferedRWPair.close().

keyword argument.  string.Formatter now allows to specify the "self" and
the "format_string" parameters as keyword arguments.

It should help to see exceptions when stderr if buffered: PyErr_Display() calls
sys.stderr.write(), it doesn't write into stderr file descriptor directly.

* Display the current Python stack if an exception was raised but the exception
  has no traceback
* Disable faulthandler if an exception was raised (before it was only disabled
  if no exception was raised)
* To display the current Python stack, call PyGILState_GetThisThreadState()
  which works even if the GIL was released

Issue #23654: Turn off ICC's tail call optimization for the stack_overflow
generator. ICC turns the recursive tail call into a loop.

Patch written by Matt Frank.

GzipFile corruption.  Original patch by Wolfgang Maier.

Issue 23729:  Document ElementTree namespace handling and fix an omission in the XPATH predicate table.

Some http servers will reject PUT, POST, and PATCH requests if they
do not have a Content-Length header.

Patch by James Rutherford, with additional cleaning up of the
'request' documentation by me.

Patch by Mike Short.

raising TypeError when statically allocated type subclasses dynamically
allocated type

and socket open until the garbage collector cleans them up.  Patch by
Martin Panter.

Also renames a local to avoid warnings about shadowing

Windows has no memrchr() function.

This change is only a workaround, the optimization must be reenabled on other
platforms.

Flushing sys.stdout and sys.stderr in Py_FatalError() can call again
Py_FatalError(). Add a reentrant flag to detect this case and just abort at the
second call.

writer failed in BufferedRWPair.close().

and ASCII letter now raise a deprecation warning and will be forbidden in
Python 3.6.