Issue #21918: Convert test_tools.py to a sub-package of test.
Issue #21918: Convert test_tools.py to a sub-package of test.

Merge with 3.4.
Fix a minor typo in the turtle docs.  Found by Brandon Passmore on docs@.
Merge with 3.4
Issue 21044: tarfile.open() now handles fileobj with an integer 'name'
attribute.  Based on patch by Martin Panter.
Issue 21044: tarfile.open() now handles fileobj with an integer 'name'
attribute.  Based on patch by Martin Panter.