[Merge] ~mruffell/ubuntu-release-upgrader:lp1982534 into ubuntu-release-upgrader:ubuntu/focal

[Matthew Ruffell]

Hi Brian,

I have resolved all pep8 issues with the quirk and testcases. Thanks for pointing them out, please have another look.

Thanks,
Matthew
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https://code.launchpad.net/~mruffell/ubuntu-release-upgrader/+git/ubuntu-release-upgrader/+merge/432566
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