signal handler doesn't handle SIGABRT from os.abort

Doc/library/os.rst

 :mod:`os` --- Miscellaneous operating system interfaces
 =======================================================
 
 .. module:: os
    :synopsis: Miscellaneous operating system interfaces.
 
 
 This module provides a portable way of using operating system dependent
 functionality.  If you just want to read or write a file see :func:`open`, if
 you want to manipulate paths, see the :mod:`os.path` module, and if you want to
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 have typed on a command line.  For the C programmer, this is the ``argv[0]``
 passed to a program's :cfunc:`main`.  For example, ``os.execv('/bin/echo',
 ['foo', 'bar'])`` will only print ``bar`` on standard output; ``foo`` will seem
 to be ignored.
 
 
 .. function:: abort()
 
    Generate a :const:`SIGABRT` signal to the current process.  On Unix, the default
    behavior is to produce a core dump; on Windows, the process immediately returns
-   an exit code of ``3``.  Be aware that programs which use :func:`signal.signal`
-   to register a handler for :const:`SIGABRT` will behave differently.
+   an exit code of ``3``.  Be aware that calling this function will not call the
+   Python signal handler registered for :const:`SIGABRT` with
+   :func:`signal.signal`.
 
    Availability: Unix, Windows.
 
 
 .. function:: execl(path, arg0, arg1, ...)
               execle(path, arg0, arg1, ..., env)
               execlp(file, arg0, arg1, ...)
               execlpe(file, arg0, arg1, ..., env)
               execv(path, args)
               execve(path, args, env)
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    Return a string of *n* random bytes suitable for cryptographic use.
 
    This function returns random bytes from an OS-specific randomness source.  The
    returned data should be unpredictable enough for cryptographic applications,
    though its exact quality depends on the OS implementation.  On a UNIX-like
    system this will query /dev/urandom, and on Windows it will use CryptGenRandom.
    If a randomness source is not found, :exc:`NotImplementedError` will be raised.
 
    .. versionadded:: 2.4