* Cannot seem to link directly to main options from the “unittest” module,
  because that module has its own set of options
* Mask out linking for options that no longer exist in Python 3

special input values as literal text.

PyUnicode_AsEncodedObject() in _curese to ensure that the result
is a bytes object.

Patch by Tim Mitchell.

subclasses of accelerated OrderedDict.

at the start of new line after printing a month's calendar.  Patch by
Xiang Zhang.

Based on patch by Kaarle Ritvanen.

Patch from vierja.

a workaround to Tix library bug.

Issue #27989: Tweak inspect.formatannotation() to improve pydoc rendering of function annotations. Ivan L.

Patch by Piotr Szczepaniak.

* Use context manager on urllib objects to ensure that they are closed on error
* Use self.addCleanup() to cleanup resources even if a test is interrupted
  with CTRL+c

This backports a patch by Victor Stinner.

Initial patch by Hans Lawrenz.

Patch by Johannes Ebke.

Thanks to Ville Skyttä for the patch.