[issue21573] Clean up turtle.py code formatting

[Raymond Hettinger]

Raymond Hettinger added the comment:

I would like to provide a final review before of any proposed changes.

Also, along the way, I would happy to provide suggestions for more substantive changes (instead of shallow PEP 8 or PyLint changes).  

The primary defect in the modules is that the code got "adultified" somewhere along the way and needs to migrate back to the sort of straight-forward code that kids can read and model their code after.

I've use this code to help train adults to teach kids and found that it needs to use a simpler feature set.

----------
nosy: +rhettinger

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21573>
_______________________________________