the interpreter with characters outside the Basic Multilingual Plane
(higher than 0x10000).

Backport of revisions 81897, 81898 and 81902 from py3k.

Issue 8948. cleanup functions are not run by unittest.TestCase.debug(), plus class and module teardowns are not run by unittest.TestSuite.debug().

done in r81843 for py3k.

Documentation updates for issues 8302 and 8351 (truncating excessive diffs in unittest failure messages and reporting SkipTest exceptions in setUpClass and setUpModule as skips rather than errors).

Tests for issue 8302, skipped test in a setUpClass or a setUpModule are reported as skips rather than errors.

Issue 8302. SkipTest exception is setUpClass or setUpModule is now reported as a skip rather than an error.