[issue30290] IDLE: add tests for help_about.py

[Cheryl Sabella]

Cheryl Sabella added the comment:

Oh, I had started to make the changes, but that's OK.  I'm still doing discovery too.  'Fun' did mean that I'll try something.  This is exactly what I wanted to work on to dive into tkinter and idle, so I got excited.

Louie, just to coordinate, are you working on other items that Terry listed here?

Terry, should I do each item in its own PR for quick review or should I try to do many at once in a single PR?  I was doing both the name changes and docstrings (and now maybe the import change) in one PR, but maybe that's too much?

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<http://bugs.python.org/issue30290>
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