refactor: Use diff in patch tests rather than raw output

[vicb]

IMO it makes the tests much more readable

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Status	Category	Percentage	Covered / Total
🔵	Lines	26.89%	2606 / 9689
🔵	Statements	26.89%	2606 / 9689
🔵	Functions	53.72%	137 / 255
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[conico974]

Yeah great things to add, some of the test were barely readable.
Just a little nit