[issue21933] Allow the user to change font sizes with the text pane of turtledemo

[Terry J. Reedy]

Terry J. Reedy added the comment:

Lita, thank you for sticking with this. #17642 is about doing something similar for Idle. The issue is necessarily more complicated, but what we learned here about system difference and tk behavior oddities will be needed for Idle too.  I am making 'what we learned' comments there.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21933>
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