Misleading Expected preview in 7_color_inversion failure output

[vaibhav-patel]

Hi team, I think the failure renderer for easy/7_color_inversion is showing an incorrect/misleading Expected preview.

For a failed test (width=64, height=64), the output showed:

• Expected: [72, 248, 144, 179, 88, ..., 254, 61, 26, 168, 53]
• Got: [72, 248, 144, 179, 88, ..., 254, 194, 229, 87, 53]

But for this challenge, RGB should be inverted and alpha unchanged:

• 194 = 255 - 61
• 229 = 255 - 26
• 87 = 255 - 168
• 53 (alpha) unchanged

So the Got tail appears to follow the spec, while the Expected tail appears non-inverted (like raw input), which is confusing.

Could you check whether the mismatch formatter is:

1. printing the wrong buffer under Expected, or
2. mixing/truncating slices incorrectly?

Thanks!