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I really love https://diffdiff.net for quickly looking at diffs -- it does a great job of highlighting diffs inside a single line

used it yesterday to debug a networking issue by diffing two tcpdump outputs and it was SO helpful, it made it immediately obvious that the MSS was different between the two connections

(the screenshot isn't the actual bug, just a diff of two tcpdump outputs)

I feel like there must be a command line tool that does this but I can't find it (delta doesn't seem to)