[issue33839] IDLE tooltips.py: refactor and add docstrings and tests

[Tal Einat]

Tal Einat <taleinat at gmail.com> added the comment:

The refactoring is done, manual testing with the htests works, and I've added automated tests with ~92% code coverage.

Terry, I'd be happy for your review!

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33839>
_______________________________________