Patch by John O'Connor.

Patch written by Éric Araujo.

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

str not bytes. The PEP-0333 says that and test_wsgiref follows the same.
Updated docs accordingly.

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

str not bytes. The PEP-0333 says that and test_wsgiref follows the same.
Updated docs accordingly.

ValueError when presented with an unsupported Authentication Scheme.

Issue #12039 - Update the http.server.rst with the requirement to call `end_headers` after calling `send_header`.

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.

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.

System log2() is not accurate for exact power of 2.

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

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

instead of a RuntimeError: OSError has an errno attribute.