Code formatting often involves "extra whitespace" or "missing whitespace" or "CRLF vs LF" issues.
Unfortunately, whitespace is not visible by default.

What if there was an option to visualize the whitespace that contributes to the diff?

For instance: use ␍␊ characters when output encoding allows. Use · for space visualization, and so on.

Note: the point is not "visualize all the whitespace characters", but "visualize only those chars that contribute to the diff".