Issue #19804: The test_find_mac test in test_uuid is now skipped if the
ifconfig executable is not available.
Issue #20086: Output more details when test_getsetlocale_issue1813 is failed.
Fixed test_tempfilepager in test_pydoc on Windows.

Filename such as r'c:\users\db3l\appdata\local\temp\tmph3vkvf' contains '\t'
which is interpreted by ast.literal_eval() as a tabulation.