Fix for potentials errors in constructing unittest failure messages. Plus skipped test methods no longer run setUp and tearDown (Issue 8059)

code using struct.pack, attempt to convert to an integer first using
the argument's __int__ method (if present).  Also raise a
DeprecationWarning for any such usage of __int__.

This fixes a regression from 2.6, where some (but not all) integer
conversion codes already used __int__.

Do not hide the KeyboardInterrupt on POSIX platforms.

effectively raised.  A new utility ``check_py3k_warnings`` deals with py3k warnings.

specified

Remove two hacks which are no longer needed after #7712, because all __file__ attributes are absolute.

process state.  Should fix issue8045.