Closes #18272: use 'builtins' for 3.3 instead of __builtin__
Closes #18267: use floor division in code example
Closes #18239: correct description of count() in module docstring
Closes #18218: use correct variable name for starting point
Add tests for untested features of the 'stat' module (part of issue #11016)
Fix test_stat on BSD, /dev/da0 and /dev/ad0 are links