the expected builtin modules are not present.

This includes a unittest for __get_builtin_constructor() in the face
of such an error.

a smarter "py-bt" command printing a classic Python traceback.

on a file opened in read+write mode (namely: reading, seeking a bit forward,
writing, then seeking before the previous write but still within buffered
data, and writing again).

on a file opened in read+write mode (namely: reading, seeking a bit forward,
writing, then seeking before the previous write but still within buffered
data, and writing again).

_tkinter.c is returning <class '_tkinter.Tcl_Obj'> sometimes.  Don't use
tkinter.messagebox.Message - use the helper functions which convert to str.

With Tk < 8.5 _tkinter.c:PythonCmd() raised UnicodeDecodeError, caused IDLE to
exit.  Converted to valid Unicode null in PythonCmd().

bytes. The PEP-0333 says that and test_wsgiref follows the same.  Updated docs
accordingly.

non-ASCII scripts. Open and write the script in binary mode, but ensure that
the shebang is decodable from UTF-8 and from the encoding of the script.

escape surrogate characters and show spaces.

non-ASCII path (path to the Python executable). Open and write the script in
binary mode, but ensure that the shebang is decodable from UTF-8 and from the
encoding of the script.

#12051: Fix segfault in json.dumps() while encoding highly-nested objects using the C accelerations.

order to accept exactly one connection.  Patch by Daniel Evers.

OpenSSL is now compiled with OPENSSL_NO_SSL2 defined (without the SSLv2
protocol) on Debian: fix the ssl module on Debian Testing and Debian Sid.

Optimize also ssl.get_protocol_name(): speed does matter!

OpenSSL is now compiled with OPENSSL_NO_SSL2 defined (without the SSLv2
protocol) on Debian: fix the ssl module on Debian Testing and Debian Sid.

Optimize also ssl.get_protocol_name(): speed does matter!

the end-of-file indicator after CTRL+d.

clear the end-of-file indicator after CTRL+d.

Patch by Arfrever Frehtes Taifersar Arahesis.

Patch by Arfrever Frehtes Taifersar Arahesis.