Issue #17827: Document codecs.encode and codecs.decode
Issue #18919: Unified and extended tests for audio modules: aifc, sunau and
wave.
Merge heads
Issue #19198: Improved cross-references in the cgi module documentation.
Issue #19203: Improved cross-references in the curses howto.
Refer to strftime(3) manpage for platform specific format codes.

Suggested by Skip Montanaro on docs@.
Improve #19204: Improved cross-references in the urllib package documentation.
Issue #19207: Improved cross-references in the os, os.path, and posix modules
documentation.
Issue #19197: Improved cross-references in the shlex module documentation.
Issue #18776: atexit callbacks now display their full traceback when they raise an exception.
Issue #18758: Fixed and improved cross-references.
Closes #19248: actually check for Python 3.x in tools/sphinx-build.py.
Wing IDE is switching to PyQt...
Merge heads
Closes #16657: fix docstring of traceback.format_tb().
#4965: Implement intelligent scrolling of the sidebar in the docs.