Need tests of turtledemo.colordemo on Windows installations

[MRAB]

On 2020-09-14 02:18, Terry Reedy wrote:
> User Tushar Sadhwani and I both have Win 10 with 3.8.5 installed.  When
> he runs
> ...> py -3.8 -m turtledemo.colormixer
> and moves the sliders a reasonable amount, he repeatably gets
> Fatal Python error: Cannot recover from stack overflow.
> ...
> https://bugs.python.org/issue41758
> 
> I have no problem, regardless of version, PowerShell or Command Prompt,
> installation or repository build.  I suspect that the issue is specific
> to his machine, but before closing, we need more evidence either way.
> 
No problem here either.