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To be honest I don't know about yellow lines... on my dell monitor with icc profile made by dell, square have the same color as area around, which indicates perfect 2.2 gamma.
you can't use this image to configure color though, this is for checking gamma only. maybe your display just old or not at its native resolution or something. but anyway it doesn't looks like something that can be fixed by adjusting r,g or b plane...
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