Django 2.1 Upgrades and `black` formatting#3

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mm wants to merge 3 commits intomasterfrom

Commits on Dec 15, 2023

Updates for Django2
mgingras
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Commits on Dec 16, 2023

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mgingras
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Commits on Jul 31, 2024

goofy ahh Django, the ExceptionReporter.format_exception method was removed silently post Django 1.11
mm
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