Config linter does not take whitespace differences into account

[gonX]

Seen in #3862 - PR provided a 4-wide indentation, but 2-wide indentation is expected:

OpenTabletDriver/OpenTabletDriver.Tests/ConfigurationTest.cs

Lines 331 to 334 in fa7de50

	{
	Formatting = Formatting.Indented,
	Indentation = 2
	};

This likely happens on both 0.6.x and avalonia

DiffPlex.Diff has ignoreWhiteSpace = true as default - if we set this to false it'll likely fix the issues:
https://github.com/mmanela/diffplex/blob/b95d2e6da3cd185c3c6b0b50d715a36d781426ad/DiffPlex/DiffBuilder/InlineDiffBuilder.cs#L68

We should fix this relatively quickly before further bad configs are merged.