[issue39089] Update IDLE's credits

[Tal Einat]

New submission from Tal Einat <taleinat+python at gmail.com>:

The "Credits" document in the "About" dialog could use some updating. It fails to mention Saimadhav Heblikar's important work during GSoC 2014 as well as Terry J. Reedy's tireless work over the past few years which has helped keep IDLE in working order and the codebase in reasonable shape given its age.

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assignee: terry.reedy
components: IDLE
messages: 358636
nosy: taleinat, terry.reedy
priority: normal
severity: normal
status: open
title: Update IDLE's credits
versions: Python 3.7, Python 3.8, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39089>
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